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Finding the Fourth Proportional to 64,780.62, 89,419.64 and 37,931.76

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Solution

The fourth proportional to 64,780.62, 89,419.64 and 37,931.76 is: 52,358.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,780.62 : 89,419.64 = 37,931.76 : x
  2. Step 2: Convert to fraction form
    64,780.62/89,419.64 = 37,931.76/x
  3. Step 3: Cross multiply
    64,780.62x = 89,419.64 × 37,931.76
  4. Step 4: Simplify right side
    64,780.62x = 3,391,844,323.77
  5. Step 5: Solve for x
    x = 3,391,844,323.77/64,780.62
  6. Step 6: Final answer
    x = 52,358.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.