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Finding the Fourth Proportional to 74,689.90, 103,077.16 and 45,630.70

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Solution

The fourth proportional to 74,689.90, 103,077.16 and 45,630.70 is: 62,973.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,689.90 : 103,077.16 = 45,630.70 : x
  2. Step 2: Convert to fraction form
    74,689.90/103,077.16 = 45,630.70/x
  3. Step 3: Cross multiply
    74,689.90x = 103,077.16 × 45,630.70
  4. Step 4: Simplify right side
    74,689.90x = 4,703,482,964.81
  5. Step 5: Solve for x
    x = 4,703,482,964.81/74,689.90
  6. Step 6: Final answer
    x = 62,973.48

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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.