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Finding the Fourth Proportional to 103,437.30, 155,155.95 and 98,625.90

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Solution

The fourth proportional to 103,437.30, 155,155.95 and 98,625.90 is: 147,938.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,437.30 : 155,155.95 = 98,625.90 : x
  2. Step 2: Convert to fraction form
    103,437.30/155,155.95 = 98,625.90/x
  3. Step 3: Cross multiply
    103,437.30x = 155,155.95 × 98,625.90
  4. Step 4: Simplify right side
    103,437.30x = 15,302,395,209.11
  5. Step 5: Solve for x
    x = 15,302,395,209.11/103,437.30
  6. Step 6: Final answer
    x = 147,938.85

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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.