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Finding the Fourth Proportional to 84,570.82, 126,235.48 and 74,605.66

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Solution

The fourth proportional to 84,570.82, 126,235.48 and 74,605.66 is: 111,360.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,570.82 : 126,235.48 = 74,605.66 : x
  2. Step 2: Convert to fraction form
    84,570.82/126,235.48 = 74,605.66/x
  3. Step 3: Cross multiply
    84,570.82x = 126,235.48 × 74,605.66
  4. Step 4: Simplify right side
    84,570.82x = 9,417,881,300.82
  5. Step 5: Solve for x
    x = 9,417,881,300.82/84,570.82
  6. Step 6: Final answer
    x = 111,360.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.