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Finding the Fourth Proportional to 142,479.40, 213,719.10 and 136,412.20

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Solution

The fourth proportional to 142,479.40, 213,719.10 and 136,412.20 is: 204,618.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,479.40 : 213,719.10 = 136,412.20 : x
  2. Step 2: Convert to fraction form
    142,479.40/213,719.10 = 136,412.20/x
  3. Step 3: Cross multiply
    142,479.40x = 213,719.10 × 136,412.20
  4. Step 4: Simplify right side
    142,479.40x = 29,153,892,613.02
  5. Step 5: Solve for x
    x = 29,153,892,613.02/142,479.40
  6. Step 6: Final answer
    x = 204,618.30

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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.