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Finding the Fourth Proportional to 61,844.40, 85,345.92 and 34,987.20

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Solution

The fourth proportional to 61,844.40, 85,345.92 and 34,987.20 is: 48,282.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,844.40 : 85,345.92 = 34,987.20 : x
  2. Step 2: Convert to fraction form
    61,844.40/85,345.92 = 34,987.20/x
  3. Step 3: Cross multiply
    61,844.40x = 85,345.92 × 34,987.20
  4. Step 4: Simplify right side
    61,844.40x = 2,986,014,772.22
  5. Step 5: Solve for x
    x = 2,986,014,772.22/61,844.40
  6. Step 6: Final answer
    x = 48,282.70

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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.