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Finding the Fourth Proportional to 83,640.89, 115,424.52 and 45,400.44

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Solution

The fourth proportional to 83,640.89, 115,424.52 and 45,400.44 is: 62,652.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,640.89 : 115,424.52 = 45,400.44 : x
  2. Step 2: Convert to fraction form
    83,640.89/115,424.52 = 45,400.44/x
  3. Step 3: Cross multiply
    83,640.89x = 115,424.52 × 45,400.44
  4. Step 4: Simplify right side
    83,640.89x = 5,240,323,994.79
  5. Step 5: Solve for x
    x = 5,240,323,994.79/83,640.89
  6. Step 6: Final answer
    x = 62,652.66

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1.5x scale

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.