Home / 87,333.20-130,999.80-77,656.40

Finding the Fourth Proportional to 87,333.20, 130,999.80 and 77,656.40

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Solution

The fourth proportional to 87,333.20, 130,999.80 and 77,656.40 is: 116,484.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,333.20 : 130,999.80 = 77,656.40 : x
  2. Step 2: Convert to fraction form
    87,333.20/130,999.80 = 77,656.40/x
  3. Step 3: Cross multiply
    87,333.20x = 130,999.80 × 77,656.40
  4. Step 4: Simplify right side
    87,333.20x = 10,172,972,868.72
  5. Step 5: Solve for x
    x = 10,172,972,868.72/87,333.20
  6. Step 6: Final answer
    x = 116,484.60

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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.