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Finding the Fourth Proportional to 61,985.82, 85,542.98 and 35,128.04

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Solution

The fourth proportional to 61,985.82, 85,542.98 and 35,128.04 is: 48,478.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,985.82 : 85,542.98 = 35,128.04 : x
  2. Step 2: Convert to fraction form
    61,985.82/85,542.98 = 35,128.04/x
  3. Step 3: Cross multiply
    61,985.82x = 85,542.98 × 35,128.04
  4. Step 4: Simplify right side
    61,985.82x = 3,004,957,223.16
  5. Step 5: Solve for x
    x = 3,004,957,223.16/61,985.82
  6. Step 6: Final answer
    x = 48,478.14

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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.