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Finding the Fourth Proportional to 91,885.16, 126,848.76 and 78,599.14

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Solution

The fourth proportional to 91,885.16, 126,848.76 and 78,599.14 is: 108,507.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,885.16 : 126,848.76 = 78,599.14 : x
  2. Step 2: Convert to fraction form
    91,885.16/126,848.76 = 78,599.14/x
  3. Step 3: Cross multiply
    91,885.16x = 126,848.76 × 78,599.14
  4. Step 4: Simplify right side
    91,885.16x = 9,970,203,446.07
  5. Step 5: Solve for x
    x = 9,970,203,446.07/91,885.16
  6. Step 6: Final answer
    x = 108,507.22

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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.