Home / 485,120,428.70-727,680,643.05-140,085,311.90

Finding the Fourth Proportional to 485,120,428.70, 727,680,643.05 and 140,085,311.90

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Solution

The fourth proportional to 485,120,428.70, 727,680,643.05 and 140,085,311.90 is: 210,127,967.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,120,428.70 : 727,680,643.05 = 140,085,311.90 : x
  2. Step 2: Convert to fraction form
    485,120,428.70/727,680,643.05 = 140,085,311.90/x
  3. Step 3: Cross multiply
    485,120,428.70x = 727,680,643.05 × 140,085,311.90
  4. Step 4: Simplify right side
    485,120,428.70x = 101,937,369,845,251,808
  5. Step 5: Solve for x
    x = 101,937,369,845,251,808/485,120,428.70
  6. Step 6: Final answer
    x = 210,127,967.85

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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.