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Finding the Fourth Proportional to 81,354.65, 112,190.56 and 63,443.12

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Solution

The fourth proportional to 81,354.65, 112,190.56 and 63,443.12 is: 87,490.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,354.65 : 112,190.56 = 63,443.12 : x
  2. Step 2: Convert to fraction form
    81,354.65/112,190.56 = 63,443.12/x
  3. Step 3: Cross multiply
    81,354.65x = 112,190.56 × 63,443.12
  4. Step 4: Simplify right side
    81,354.65x = 7,117,719,282.82
  5. Step 5: Solve for x
    x = 7,117,719,282.82/81,354.65
  6. Step 6: Final answer
    x = 87,490.01

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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.