Home / 86,534.40-129,801.60-53,146.20

Finding the Fourth Proportional to 86,534.40, 129,801.60 and 53,146.20

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Solution

The fourth proportional to 86,534.40, 129,801.60 and 53,146.20 is: 79,719.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,534.40 : 129,801.60 = 53,146.20 : x
  2. Step 2: Convert to fraction form
    86,534.40/129,801.60 = 53,146.20/x
  3. Step 3: Cross multiply
    86,534.40x = 129,801.60 × 53,146.20
  4. Step 4: Simplify right side
    86,534.40x = 6,898,461,793.92
  5. Step 5: Solve for x
    x = 6,898,461,793.92/86,534.40
  6. Step 6: Final answer
    x = 79,719.30

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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.