Home / 142,385.72-213,629.76-66,551.80

Finding the Fourth Proportional to 142,385.72, 213,629.76 and 66,551.80

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Solution

The fourth proportional to 142,385.72, 213,629.76 and 66,551.80 is: 99,851.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,385.72 : 213,629.76 = 66,551.80 : x
  2. Step 2: Convert to fraction form
    142,385.72/213,629.76 = 66,551.80/x
  3. Step 3: Cross multiply
    142,385.72x = 213,629.76 × 66,551.80
  4. Step 4: Simplify right side
    142,385.72x = 14,217,445,061.57
  5. Step 5: Solve for x
    x = 14,217,445,061.57/142,385.72
  6. Step 6: Final answer
    x = 99,851.62

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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.