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Finding the Fourth Proportional to 67,156,971.60, 100,710,574.20 and 21,720,248.40

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Solution

The fourth proportional to 67,156,971.60, 100,710,574.20 and 21,720,248.40 is: 32,572,324.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,156,971.60 : 100,710,574.20 = 21,720,248.40 : x
  2. Step 2: Convert to fraction form
    67,156,971.60/100,710,574.20 = 21,720,248.40/x
  3. Step 3: Cross multiply
    67,156,971.60x = 100,710,574.20 × 21,720,248.40
  4. Step 4: Simplify right side
    67,156,971.60x = 2,187,458,688,130,631.25
  5. Step 5: Solve for x
    x = 2,187,458,688,130,631.25/67,156,971.60
  6. Step 6: Final answer
    x = 32,572,324.75

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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.