Home / 86,821.60-130,188.64-42,381.76

Finding the Fourth Proportional to 86,821.60, 130,188.64 and 42,381.76

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Solution

The fourth proportional to 86,821.60, 130,188.64 and 42,381.76 is: 63,551.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,821.60 : 130,188.64 = 42,381.76 : x
  2. Step 2: Convert to fraction form
    86,821.60/130,188.64 = 42,381.76/x
  3. Step 3: Cross multiply
    86,821.60x = 130,188.64 × 42,381.76
  4. Step 4: Simplify right side
    86,821.60x = 5,517,623,695.21
  5. Step 5: Solve for x
    x = 5,517,623,695.21/86,821.60
  6. Step 6: Final answer
    x = 63,551.28

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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.