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Finding the Fourth Proportional to 310,077.12, 465,030.60 and 85,384.80

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Solution

The fourth proportional to 310,077.12, 465,030.60 and 85,384.80 is: 128,053.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,077.12 : 465,030.60 = 85,384.80 : x
  2. Step 2: Convert to fraction form
    310,077.12/465,030.60 = 85,384.80/x
  3. Step 3: Cross multiply
    310,077.12x = 465,030.60 × 85,384.80
  4. Step 4: Simplify right side
    310,077.12x = 39,706,544,774.88
  5. Step 5: Solve for x
    x = 39,706,544,774.88/310,077.12
  6. Step 6: Final answer
    x = 128,053.77

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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.