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Finding the Fourth Proportional to 78,909.84, 108,895.32 and 47,080.08

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Solution

The fourth proportional to 78,909.84, 108,895.32 and 47,080.08 is: 64,970.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,909.84 : 108,895.32 = 47,080.08 : x
  2. Step 2: Convert to fraction form
    78,909.84/108,895.32 = 47,080.08/x
  3. Step 3: Cross multiply
    78,909.84x = 108,895.32 × 47,080.08
  4. Step 4: Simplify right side
    78,909.84x = 5,126,800,377.23
  5. Step 5: Solve for x
    x = 5,126,800,377.23/78,909.84
  6. Step 6: Final answer
    x = 64,970.36

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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.