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Finding the Fourth Proportional to 78,809.08, 108,755.58 and 45,275.08

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Solution

The fourth proportional to 78,809.08, 108,755.58 and 45,275.08 is: 62,479.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,809.08 : 108,755.58 = 45,275.08 : x
  2. Step 2: Convert to fraction form
    78,809.08/108,755.58 = 45,275.08/x
  3. Step 3: Cross multiply
    78,809.08x = 108,755.58 × 45,275.08
  4. Step 4: Simplify right side
    78,809.08x = 4,923,917,584.95
  5. Step 5: Solve for x
    x = 4,923,917,584.95/78,809.08
  6. Step 6: Final answer
    x = 62,479.06

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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.