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Finding the Fourth Proportional to 142,000.40, 213,000.60 and 120,891.80

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Solution

The fourth proportional to 142,000.40, 213,000.60 and 120,891.80 is: 181,337.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,000.40 : 213,000.60 = 120,891.80 : x
  2. Step 2: Convert to fraction form
    142,000.40/213,000.60 = 120,891.80/x
  3. Step 3: Cross multiply
    142,000.40x = 213,000.60 × 120,891.80
  4. Step 4: Simplify right side
    142,000.40x = 25,750,025,935.08
  5. Step 5: Solve for x
    x = 25,750,025,935.08/142,000.40
  6. Step 6: Final answer
    x = 181,337.70

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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.