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Finding the Fourth Proportional to 79,990.50, 110,386.89 and 48,160.74

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Solution

The fourth proportional to 79,990.50, 110,386.89 and 48,160.74 is: 66,461.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,990.50 : 110,386.89 = 48,160.74 : x
  2. Step 2: Convert to fraction form
    79,990.50/110,386.89 = 48,160.74/x
  3. Step 3: Cross multiply
    79,990.50x = 110,386.89 × 48,160.74
  4. Step 4: Simplify right side
    79,990.50x = 5,316,314,308.70
  5. Step 5: Solve for x
    x = 5,316,314,308.70/79,990.50
  6. Step 6: Final answer
    x = 66,461.82

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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.