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Finding the Fourth Proportional to 83,710.60, 115,550.95 and 55,425.40

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Solution

The fourth proportional to 83,710.60, 115,550.95 and 55,425.40 is: 76,507.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,710.60 : 115,550.95 = 55,425.40 : x
  2. Step 2: Convert to fraction form
    83,710.60/115,550.95 = 55,425.40/x
  3. Step 3: Cross multiply
    83,710.60x = 115,550.95 × 55,425.40
  4. Step 4: Simplify right side
    83,710.60x = 6,404,456,907.81
  5. Step 5: Solve for x
    x = 6,404,456,907.81/83,710.60
  6. Step 6: Final answer
    x = 76,507.12

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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.