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Finding the Fourth Proportional to 74,880, 103,345.92 and 45,089.28

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Solution

The fourth proportional to 74,880, 103,345.92 and 45,089.28 is: 62,230.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,880 : 103,345.92 = 45,089.28 : x
  2. Step 2: Convert to fraction form
    74,880/103,345.92 = 45,089.28/x
  3. Step 3: Cross multiply
    74,880x = 103,345.92 × 45,089.28
  4. Step 4: Simplify right side
    74,880x = 4,659,793,123.74
  5. Step 5: Solve for x
    x = 4,659,793,123.74/74,880
  6. Step 6: Final answer
    x = 62,230.14

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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.