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Finding the Fourth Proportional to 142,445.80, 213,687.90 and 48,980.20

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Solution

The fourth proportional to 142,445.80, 213,687.90 and 48,980.20 is: 73,476.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,445.80 : 213,687.90 = 48,980.20 : x
  2. Step 2: Convert to fraction form
    142,445.80/213,687.90 = 48,980.20/x
  3. Step 3: Cross multiply
    142,445.80x = 213,687.90 × 48,980.20
  4. Step 4: Simplify right side
    142,445.80x = 10,466,476,079.58
  5. Step 5: Solve for x
    x = 10,466,476,079.58/142,445.80
  6. Step 6: Final answer
    x = 73,476.90

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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.