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Finding the Fourth Proportional to 90,373.86, 135,412.56 and 64,031.58

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Solution

The fourth proportional to 90,373.86, 135,412.56 and 64,031.58 is: 95,942.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,373.86 : 135,412.56 = 64,031.58 : x
  2. Step 2: Convert to fraction form
    90,373.86/135,412.56 = 64,031.58/x
  3. Step 3: Cross multiply
    90,373.86x = 135,412.56 × 64,031.58
  4. Step 4: Simplify right side
    90,373.86x = 8,670,680,168.64
  5. Step 5: Solve for x
    x = 8,670,680,168.64/90,373.86
  6. Step 6: Final answer
    x = 95,942.35

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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.