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Finding the Fourth Proportional to 61,163.78, 84,572.52 and 53,290.58

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Solution

The fourth proportional to 61,163.78, 84,572.52 and 53,290.58 is: 73,686.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,163.78 : 84,572.52 = 53,290.58 : x
  2. Step 2: Convert to fraction form
    61,163.78/84,572.52 = 53,290.58/x
  3. Step 3: Cross multiply
    61,163.78x = 84,572.52 × 53,290.58
  4. Step 4: Simplify right side
    61,163.78x = 4,506,918,642.86
  5. Step 5: Solve for x
    x = 4,506,918,642.86/61,163.78
  6. Step 6: Final answer
    x = 73,686.07

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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.