Home / 206,631,665.40-309,985,639.38-85,472,565.24

Finding the Fourth Proportional to 206,631,665.40, 309,985,639.38 and 85,472,565.24

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Solution

The fourth proportional to 206,631,665.40, 309,985,639.38 and 85,472,565.24 is: 128,224,624.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,631,665.40 : 309,985,639.38 = 85,472,565.24 : x
  2. Step 2: Convert to fraction form
    206,631,665.40/309,985,639.38 = 85,472,565.24/x
  3. Step 3: Cross multiply
    206,631,665.40x = 309,985,639.38 × 85,472,565.24
  4. Step 4: Simplify right side
    206,631,665.40x = 26,495,267,785,370,160
  5. Step 5: Solve for x
    x = 26,495,267,785,370,160/206,631,665.40
  6. Step 6: Final answer
    x = 128,224,624.89

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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.