Home / 128,896,009.40-193,344,014.10-71,565,116.60

Finding the Fourth Proportional to 128,896,009.40, 193,344,014.10 and 71,565,116.60

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Solution

The fourth proportional to 128,896,009.40, 193,344,014.10 and 71,565,116.60 is: 107,347,674.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,896,009.40 : 193,344,014.10 = 71,565,116.60 : x
  2. Step 2: Convert to fraction form
    128,896,009.40/193,344,014.10 = 71,565,116.60/x
  3. Step 3: Cross multiply
    128,896,009.40x = 193,344,014.10 × 71,565,116.60
  4. Step 4: Simplify right side
    128,896,009.40x = 13,836,686,912,978,542
  5. Step 5: Solve for x
    x = 13,836,686,912,978,542/128,896,009.40
  6. Step 6: Final answer
    x = 107,347,674.90

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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.