Home / 66,689.28-91,987.76-42,778.08

Finding the Fourth Proportional to 66,689.28, 91,987.76 and 42,778.08

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Solution

The fourth proportional to 66,689.28, 91,987.76 and 42,778.08 is: 59,005.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,689.28 : 91,987.76 = 42,778.08 : x
  2. Step 2: Convert to fraction form
    66,689.28/91,987.76 = 42,778.08/x
  3. Step 3: Cross multiply
    66,689.28x = 91,987.76 × 42,778.08
  4. Step 4: Simplify right side
    66,689.28x = 3,935,059,756.30
  5. Step 5: Solve for x
    x = 3,935,059,756.30/66,689.28
  6. Step 6: Final answer
    x = 59,005.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.