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Finding the Fourth Proportional to 142,562.60, 213,843.90 and 128,047.40

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Solution

The fourth proportional to 142,562.60, 213,843.90 and 128,047.40 is: 192,071.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,562.60 : 213,843.90 = 128,047.40 : x
  2. Step 2: Convert to fraction form
    142,562.60/213,843.90 = 128,047.40/x
  3. Step 3: Cross multiply
    142,562.60x = 213,843.90 × 128,047.40
  4. Step 4: Simplify right side
    142,562.60x = 27,382,155,400.86
  5. Step 5: Solve for x
    x = 27,382,155,400.86/142,562.60
  6. Step 6: Final answer
    x = 192,071.10

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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.