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Finding the Fourth Proportional to 102,490.70, 141,443.50 and 56,550.11

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Solution

The fourth proportional to 102,490.70, 141,443.50 and 56,550.11 is: 78,042.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,490.70 : 141,443.50 = 56,550.11 : x
  2. Step 2: Convert to fraction form
    102,490.70/141,443.50 = 56,550.11/x
  3. Step 3: Cross multiply
    102,490.70x = 141,443.50 × 56,550.11
  4. Step 4: Simplify right side
    102,490.70x = 7,998,645,696.02
  5. Step 5: Solve for x
    x = 7,998,645,696.02/102,490.70
  6. Step 6: Final answer
    x = 78,042.65

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1.5x scale

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.