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Finding the Fourth Proportional to 64,992.32, 89,691.04 and 39,855.68

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Solution

The fourth proportional to 64,992.32, 89,691.04 and 39,855.68 is: 55,001.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,992.32 : 89,691.04 = 39,855.68 : x
  2. Step 2: Convert to fraction form
    64,992.32/89,691.04 = 39,855.68/x
  3. Step 3: Cross multiply
    64,992.32x = 89,691.04 × 39,855.68
  4. Step 4: Simplify right side
    64,992.32x = 3,574,697,389.11
  5. Step 5: Solve for x
    x = 3,574,697,389.11/64,992.32
  6. Step 6: Final answer
    x = 55,001.84

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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.