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Finding the Fourth Proportional to 109,622.70, 151,283.70 and 61,873.20

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Solution

The fourth proportional to 109,622.70, 151,283.70 and 61,873.20 is: 85,387.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,622.70 : 151,283.70 = 61,873.20 : x
  2. Step 2: Convert to fraction form
    109,622.70/151,283.70 = 61,873.20/x
  3. Step 3: Cross multiply
    109,622.70x = 151,283.70 × 61,873.20
  4. Step 4: Simplify right side
    109,622.70x = 9,360,406,626.84
  5. Step 5: Solve for x
    x = 9,360,406,626.84/109,622.70
  6. Step 6: Final answer
    x = 85,387.48

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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.