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Finding the Fourth Proportional to 80,876.97, 111,656.79 and 61,605.45

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Solution

The fourth proportional to 80,876.97, 111,656.79 and 61,605.45 is: 85,051.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,876.97 : 111,656.79 = 61,605.45 : x
  2. Step 2: Convert to fraction form
    80,876.97/111,656.79 = 61,605.45/x
  3. Step 3: Cross multiply
    80,876.97x = 111,656.79 × 61,605.45
  4. Step 4: Simplify right side
    80,876.97x = 6,878,666,793.51
  5. Step 5: Solve for x
    x = 6,878,666,793.51/80,876.97
  6. Step 6: Final answer
    x = 85,051.00

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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.