Home / 258,052,000.40-387,111,178.20-128,725,715.60

Finding the Fourth Proportional to 258,052,000.40, 387,111,178.20 and 128,725,715.60

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Solution

The fourth proportional to 258,052,000.40, 387,111,178.20 and 128,725,715.60 is: 193,105,123.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,052,000.40 : 387,111,178.20 = 128,725,715.60 : x
  2. Step 2: Convert to fraction form
    258,052,000.40/387,111,178.20 = 128,725,715.60/x
  3. Step 3: Cross multiply
    258,052,000.40x = 387,111,178.20 × 128,725,715.60
  4. Step 4: Simplify right side
    258,052,000.40x = 49,831,163,430,554,120
  5. Step 5: Solve for x
    x = 49,831,163,430,554,120/258,052,000.40
  6. Step 6: Final answer
    x = 193,105,123.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.