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Finding the Fourth Proportional to 87,007.90, 130,511.85 and 84,820.90

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Solution

The fourth proportional to 87,007.90, 130,511.85 and 84,820.90 is: 127,231.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,007.90 : 130,511.85 = 84,820.90 : x
  2. Step 2: Convert to fraction form
    87,007.90/130,511.85 = 84,820.90/x
  3. Step 3: Cross multiply
    87,007.90x = 130,511.85 × 84,820.90
  4. Step 4: Simplify right side
    87,007.90x = 11,070,132,577.67
  5. Step 5: Solve for x
    x = 11,070,132,577.67/87,007.90
  6. Step 6: Final answer
    x = 127,231.35

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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.