Home / 87,023.20-130,534.80-21,359.20

Finding the Fourth Proportional to 87,023.20, 130,534.80 and 21,359.20

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Solution

The fourth proportional to 87,023.20, 130,534.80 and 21,359.20 is: 32,038.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,023.20 : 130,534.80 = 21,359.20 : x
  2. Step 2: Convert to fraction form
    87,023.20/130,534.80 = 21,359.20/x
  3. Step 3: Cross multiply
    87,023.20x = 130,534.80 × 21,359.20
  4. Step 4: Simplify right side
    87,023.20x = 2,788,118,900.16
  5. Step 5: Solve for x
    x = 2,788,118,900.16/87,023.20
  6. Step 6: Final answer
    x = 32,038.80

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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.