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Finding the Fourth Proportional to 79,288.68, 109,312.53 and 62,989.97

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Solution

The fourth proportional to 79,288.68, 109,312.53 and 62,989.97 is: 86,842.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,288.68 : 109,312.53 = 62,989.97 : x
  2. Step 2: Convert to fraction form
    79,288.68/109,312.53 = 62,989.97/x
  3. Step 3: Cross multiply
    79,288.68x = 109,312.53 × 62,989.97
  4. Step 4: Simplify right side
    79,288.68x = 6,885,592,985.32
  5. Step 5: Solve for x
    x = 6,885,592,985.32/79,288.68
  6. Step 6: Final answer
    x = 86,842.07

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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.