Home / 66,086.40-99,139.20-21,705.60

Finding the Fourth Proportional to 66,086.40, 99,139.20 and 21,705.60

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Solution

The fourth proportional to 66,086.40, 99,139.20 and 21,705.60 is: 32,561.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,086.40 : 99,139.20 = 21,705.60 : x
  2. Step 2: Convert to fraction form
    66,086.40/99,139.20 = 21,705.60/x
  3. Step 3: Cross multiply
    66,086.40x = 99,139.20 × 21,705.60
  4. Step 4: Simplify right side
    66,086.40x = 2,151,875,819.52
  5. Step 5: Solve for x
    x = 2,151,875,819.52/66,086.40
  6. Step 6: Final answer
    x = 32,561.55

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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.