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Finding the Fourth Proportional to 61,274.16, 84,480.80 and 40,019.76

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Solution

The fourth proportional to 61,274.16, 84,480.80 and 40,019.76 is: 55,176.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,274.16 : 84,480.80 = 40,019.76 : x
  2. Step 2: Convert to fraction form
    61,274.16/84,480.80 = 40,019.76/x
  3. Step 3: Cross multiply
    61,274.16x = 84,480.80 × 40,019.76
  4. Step 4: Simplify right side
    61,274.16x = 3,380,901,340.61
  5. Step 5: Solve for x
    x = 3,380,901,340.61/61,274.16
  6. Step 6: Final answer
    x = 55,176.62

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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.