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Finding the Fourth Proportional to 78,995.91, 118,493.88 and 26,405.40

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Solution

The fourth proportional to 78,995.91, 118,493.88 and 26,405.40 is: 39,608.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,995.91 : 118,493.88 = 26,405.40 : x
  2. Step 2: Convert to fraction form
    78,995.91/118,493.88 = 26,405.40/x
  3. Step 3: Cross multiply
    78,995.91x = 118,493.88 × 26,405.40
  4. Step 4: Simplify right side
    78,995.91x = 3,128,878,298.95
  5. Step 5: Solve for x
    x = 3,128,878,298.95/78,995.91
  6. Step 6: Final answer
    x = 39,608.11

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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.