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Finding the Fourth Proportional to 98,651.59, 136,140.68 and 56,209.21

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Solution

The fourth proportional to 98,651.59, 136,140.68 and 56,209.21 is: 77,569.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,651.59 : 136,140.68 = 56,209.21 : x
  2. Step 2: Convert to fraction form
    98,651.59/136,140.68 = 56,209.21/x
  3. Step 3: Cross multiply
    98,651.59x = 136,140.68 × 56,209.21
  4. Step 4: Simplify right side
    98,651.59x = 7,652,359,871.83
  5. Step 5: Solve for x
    x = 7,652,359,871.83/98,651.59
  6. Step 6: Final answer
    x = 77,569.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.