Home / 86,943.20-130,123.20-76,445.60

Finding the Fourth Proportional to 86,943.20, 130,123.20 and 76,445.60

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Solution

The fourth proportional to 86,943.20, 130,123.20 and 76,445.60 is: 114,412.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,943.20 : 130,123.20 = 76,445.60 : x
  2. Step 2: Convert to fraction form
    86,943.20/130,123.20 = 76,445.60/x
  3. Step 3: Cross multiply
    86,943.20x = 130,123.20 × 76,445.60
  4. Step 4: Simplify right side
    86,943.20x = 9,947,346,097.92
  5. Step 5: Solve for x
    x = 9,947,346,097.92/86,943.20
  6. Step 6: Final answer
    x = 114,412.01

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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.