Home / 112,654.64-155,376.60-78,651.92

Finding the Fourth Proportional to 112,654.64, 155,376.60 and 78,651.92

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Solution

The fourth proportional to 112,654.64, 155,376.60 and 78,651.92 is: 108,479.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,654.64 : 155,376.60 = 78,651.92 : x
  2. Step 2: Convert to fraction form
    112,654.64/155,376.60 = 78,651.92/x
  3. Step 3: Cross multiply
    112,654.64x = 155,376.60 × 78,651.92
  4. Step 4: Simplify right side
    112,654.64x = 12,220,667,913.07
  5. Step 5: Solve for x
    x = 12,220,667,913.07/112,654.64
  6. Step 6: Final answer
    x = 108,479.05

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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.