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Finding the Fourth Proportional to 72,943.15, 100,690.54 and 62,693.61

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Solution

The fourth proportional to 72,943.15, 100,690.54 and 62,693.61 is: 86,542.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,943.15 : 100,690.54 = 62,693.61 : x
  2. Step 2: Convert to fraction form
    72,943.15/100,690.54 = 62,693.61/x
  3. Step 3: Cross multiply
    72,943.15x = 100,690.54 × 62,693.61
  4. Step 4: Simplify right side
    72,943.15x = 6,312,653,131.98
  5. Step 5: Solve for x
    x = 6,312,653,131.98/72,943.15
  6. Step 6: Final answer
    x = 86,542.10

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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.