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Finding the Fourth Proportional to 61,108.88, 84,128.76 and 53,146.88

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Solution

The fourth proportional to 61,108.88, 84,128.76 and 53,146.88 is: 73,167.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,108.88 : 84,128.76 = 53,146.88 : x
  2. Step 2: Convert to fraction form
    61,108.88/84,128.76 = 53,146.88/x
  3. Step 3: Cross multiply
    61,108.88x = 84,128.76 × 53,146.88
  4. Step 4: Simplify right side
    61,108.88x = 4,471,181,112.27
  5. Step 5: Solve for x
    x = 4,471,181,112.27/61,108.88
  6. Step 6: Final answer
    x = 73,167.45

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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.