Home / 81,565.38-112,623.21-65,724.21

Finding the Fourth Proportional to 81,565.38, 112,623.21 and 65,724.21

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Solution

The fourth proportional to 81,565.38, 112,623.21 and 65,724.21 is: 90,750.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,565.38 : 112,623.21 = 65,724.21 : x
  2. Step 2: Convert to fraction form
    81,565.38/112,623.21 = 65,724.21/x
  3. Step 3: Cross multiply
    81,565.38x = 112,623.21 × 65,724.21
  4. Step 4: Simplify right side
    81,565.38x = 7,402,071,504.91
  5. Step 5: Solve for x
    x = 7,402,071,504.91/81,565.38
  6. Step 6: Final answer
    x = 90,750.16

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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.