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Finding the Fourth Proportional to 61,655.76, 85,172.04 and 49,064.40

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Solution

The fourth proportional to 61,655.76, 85,172.04 and 49,064.40 is: 67,778.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,655.76 : 85,172.04 = 49,064.40 : x
  2. Step 2: Convert to fraction form
    61,655.76/85,172.04 = 49,064.40/x
  3. Step 3: Cross multiply
    61,655.76x = 85,172.04 × 49,064.40
  4. Step 4: Simplify right side
    61,655.76x = 4,178,915,039.38
  5. Step 5: Solve for x
    x = 4,178,915,039.38/61,655.76
  6. Step 6: Final answer
    x = 67,778.18

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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.