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Finding the Fourth Proportional to 87,038.96, 129,969.06 and 69,067.79

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Solution

The fourth proportional to 87,038.96, 129,969.06 and 69,067.79 is: 103,134.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,038.96 : 129,969.06 = 69,067.79 : x
  2. Step 2: Convert to fraction form
    87,038.96/129,969.06 = 69,067.79/x
  3. Step 3: Cross multiply
    87,038.96x = 129,969.06 × 69,067.79
  4. Step 4: Simplify right side
    87,038.96x = 8,976,675,321.11
  5. Step 5: Solve for x
    x = 8,976,675,321.11/87,038.96
  6. Step 6: Final answer
    x = 103,134.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.