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Finding the Fourth Proportional to 72,918.54, 109,377.81 and 56,302.74

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Solution

The fourth proportional to 72,918.54, 109,377.81 and 56,302.74 is: 84,454.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,918.54 : 109,377.81 = 56,302.74 : x
  2. Step 2: Convert to fraction form
    72,918.54/109,377.81 = 56,302.74/x
  3. Step 3: Cross multiply
    72,918.54x = 109,377.81 × 56,302.74
  4. Step 4: Simplify right side
    72,918.54x = 6,158,270,398.20
  5. Step 5: Solve for x
    x = 6,158,270,398.20/72,918.54
  6. Step 6: Final answer
    x = 84,454.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.