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Finding the Fourth Proportional to 72,363.04, 99,780.60 and 45,473.20

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Solution

The fourth proportional to 72,363.04, 99,780.60 and 45,473.20 is: 62,702.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,363.04 : 99,780.60 = 45,473.20 : x
  2. Step 2: Convert to fraction form
    72,363.04/99,780.60 = 45,473.20/x
  3. Step 3: Cross multiply
    72,363.04x = 99,780.60 × 45,473.20
  4. Step 4: Simplify right side
    72,363.04x = 4,537,343,179.92
  5. Step 5: Solve for x
    x = 4,537,343,179.92/72,363.04
  6. Step 6: Final answer
    x = 62,702.50

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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.