Home / 143,475.60-215,251.80-128,000.40

Finding the Fourth Proportional to 143,475.60, 215,251.80 and 128,000.40

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Solution

The fourth proportional to 143,475.60, 215,251.80 and 128,000.40 is: 192,034.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,475.60 : 215,251.80 = 128,000.40 : x
  2. Step 2: Convert to fraction form
    143,475.60/215,251.80 = 128,000.40/x
  3. Step 3: Cross multiply
    143,475.60x = 215,251.80 × 128,000.40
  4. Step 4: Simplify right side
    143,475.60x = 27,552,316,500.72
  5. Step 5: Solve for x
    x = 27,552,316,500.72/143,475.60
  6. Step 6: Final answer
    x = 192,034.86

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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.