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Finding the Fourth Proportional to 78,612.80, 108,468.81 and 46,775.48

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Solution

The fourth proportional to 78,612.80, 108,468.81 and 46,775.48 is: 64,540.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,612.80 : 108,468.81 = 46,775.48 : x
  2. Step 2: Convert to fraction form
    78,612.80/108,468.81 = 46,775.48/x
  3. Step 3: Cross multiply
    78,612.80x = 108,468.81 × 46,775.48
  4. Step 4: Simplify right side
    78,612.80x = 5,073,680,652.78
  5. Step 5: Solve for x
    x = 5,073,680,652.78/78,612.80
  6. Step 6: Final answer
    x = 64,540.13

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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.