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Finding the Fourth Proportional to 91,807.43, 126,739.13 and 71,341.25

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Solution

The fourth proportional to 91,807.43, 126,739.13 and 71,341.25 is: 98,485.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,807.43 : 126,739.13 = 71,341.25 : x
  2. Step 2: Convert to fraction form
    91,807.43/126,739.13 = 71,341.25/x
  3. Step 3: Cross multiply
    91,807.43x = 126,739.13 × 71,341.25
  4. Step 4: Simplify right side
    91,807.43x = 9,041,726,967.71
  5. Step 5: Solve for x
    x = 9,041,726,967.71/91,807.43
  6. Step 6: Final answer
    x = 98,485.79

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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.