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Finding the Fourth Proportional to 64,031.52, 96,081.12 and 45,431.76

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Solution

The fourth proportional to 64,031.52, 96,081.12 and 45,431.76 is: 68,171.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,031.52 : 96,081.12 = 45,431.76 : x
  2. Step 2: Convert to fraction form
    64,031.52/96,081.12 = 45,431.76/x
  3. Step 3: Cross multiply
    64,031.52x = 96,081.12 × 45,431.76
  4. Step 4: Simplify right side
    64,031.52x = 4,365,134,384.37
  5. Step 5: Solve for x
    x = 4,365,134,384.37/64,031.52
  6. Step 6: Final answer
    x = 68,171.65

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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.