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Finding the Fourth Proportional to 60,876.80, 84,051.36 and 39,418.40

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Solution

The fourth proportional to 60,876.80, 84,051.36 and 39,418.40 is: 54,424.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,876.80 : 84,051.36 = 39,418.40 : x
  2. Step 2: Convert to fraction form
    60,876.80/84,051.36 = 39,418.40/x
  3. Step 3: Cross multiply
    60,876.80x = 84,051.36 × 39,418.40
  4. Step 4: Simplify right side
    60,876.80x = 3,313,170,129.02
  5. Step 5: Solve for x
    x = 3,313,170,129.02/60,876.80
  6. Step 6: Final answer
    x = 54,424.18

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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.