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Finding the Fourth Proportional to 61,681.80, 85,120.56 and 34,824.90

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Solution

The fourth proportional to 61,681.80, 85,120.56 and 34,824.90 is: 48,058.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,681.80 : 85,120.56 = 34,824.90 : x
  2. Step 2: Convert to fraction form
    61,681.80/85,120.56 = 34,824.90/x
  3. Step 3: Cross multiply
    61,681.80x = 85,120.56 × 34,824.90
  4. Step 4: Simplify right side
    61,681.80x = 2,964,314,989.94
  5. Step 5: Solve for x
    x = 2,964,314,989.94/61,681.80
  6. Step 6: Final answer
    x = 48,058.18

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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.