Home / 145,031.20-217,546.80-85,836.40

Finding the Fourth Proportional to 145,031.20, 217,546.80 and 85,836.40

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Solution

The fourth proportional to 145,031.20, 217,546.80 and 85,836.40 is: 128,754.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,031.20 : 217,546.80 = 85,836.40 : x
  2. Step 2: Convert to fraction form
    145,031.20/217,546.80 = 85,836.40/x
  3. Step 3: Cross multiply
    145,031.20x = 217,546.80 × 85,836.40
  4. Step 4: Simplify right side
    145,031.20x = 18,673,434,143.52
  5. Step 5: Solve for x
    x = 18,673,434,143.52/145,031.20
  6. Step 6: Final answer
    x = 128,754.60

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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.