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Finding the Fourth Proportional to 70,221.47, 105,221.57 and 25,787.16

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Solution

The fourth proportional to 70,221.47, 105,221.57 and 25,787.16 is: 38,640.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,221.47 : 105,221.57 = 25,787.16 : x
  2. Step 2: Convert to fraction form
    70,221.47/105,221.57 = 25,787.16/x
  3. Step 3: Cross multiply
    70,221.47x = 105,221.57 × 25,787.16
  4. Step 4: Simplify right side
    70,221.47x = 2,713,365,332.11
  5. Step 5: Solve for x
    x = 2,713,365,332.11/70,221.47
  6. Step 6: Final answer
    x = 38,640.11

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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.