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Finding the Fourth Proportional to 112,657.64, 155,380.74 and 78,654.92

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Solution

The fourth proportional to 112,657.64, 155,380.74 and 78,654.92 is: 108,483.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,657.64 : 155,380.74 = 78,654.92 : x
  2. Step 2: Convert to fraction form
    112,657.64/155,380.74 = 78,654.92/x
  3. Step 3: Cross multiply
    112,657.64x = 155,380.74 × 78,654.92
  4. Step 4: Simplify right side
    112,657.64x = 12,221,459,674.24
  5. Step 5: Solve for x
    x = 12,221,459,674.24/112,657.64
  6. Step 6: Final answer
    x = 108,483.19

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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.