Home / 86,619.60-129,929.40-53,377.20

Finding the Fourth Proportional to 86,619.60, 129,929.40 and 53,377.20

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Solution

The fourth proportional to 86,619.60, 129,929.40 and 53,377.20 is: 80,065.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,619.60 : 129,929.40 = 53,377.20 : x
  2. Step 2: Convert to fraction form
    86,619.60/129,929.40 = 53,377.20/x
  3. Step 3: Cross multiply
    86,619.60x = 129,929.40 × 53,377.20
  4. Step 4: Simplify right side
    86,619.60x = 6,935,267,569.68
  5. Step 5: Solve for x
    x = 6,935,267,569.68/86,619.60
  6. Step 6: Final answer
    x = 80,065.80

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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.