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Finding the Fourth Proportional to 72,242.95, 99,693.02 and 39,975.62

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Solution

The fourth proportional to 72,242.95, 99,693.02 and 39,975.62 is: 55,165.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,242.95 : 99,693.02 = 39,975.62 : x
  2. Step 2: Convert to fraction form
    72,242.95/99,693.02 = 39,975.62/x
  3. Step 3: Cross multiply
    72,242.95x = 99,693.02 × 39,975.62
  4. Step 4: Simplify right side
    72,242.95x = 3,985,290,333.53
  5. Step 5: Solve for x
    x = 3,985,290,333.53/72,242.95
  6. Step 6: Final answer
    x = 55,165.11

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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.