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Finding the Fourth Proportional to 103,640.60, 155,463.42 and 77,511.26

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Solution

The fourth proportional to 103,640.60, 155,463.42 and 77,511.26 is: 116,268.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,640.60 : 155,463.42 = 77,511.26 : x
  2. Step 2: Convert to fraction form
    103,640.60/155,463.42 = 77,511.26/x
  3. Step 3: Cross multiply
    103,640.60x = 155,463.42 × 77,511.26
  4. Step 4: Simplify right side
    103,640.60x = 12,050,165,568.11
  5. Step 5: Solve for x
    x = 12,050,165,568.11/103,640.60
  6. Step 6: Final answer
    x = 116,268.77

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1.5x scale

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.