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Finding the Fourth Proportional to 84,555.60, 126,841.80 and 31,261.56

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Solution

The fourth proportional to 84,555.60, 126,841.80 and 31,261.56 is: 46,895.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,555.60 : 126,841.80 = 31,261.56 : x
  2. Step 2: Convert to fraction form
    84,555.60/126,841.80 = 31,261.56/x
  3. Step 3: Cross multiply
    84,555.60x = 126,841.80 × 31,261.56
  4. Step 4: Simplify right side
    84,555.60x = 3,965,272,541.21
  5. Step 5: Solve for x
    x = 3,965,272,541.21/84,555.60
  6. Step 6: Final answer
    x = 46,895.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.