Home / 112,665.60-155,455.20-85,760.64

Finding the Fourth Proportional to 112,665.60, 155,455.20 and 85,760.64

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Solution

The fourth proportional to 112,665.60, 155,455.20 and 85,760.64 is: 118,331.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,665.60 : 155,455.20 = 85,760.64 : x
  2. Step 2: Convert to fraction form
    112,665.60/155,455.20 = 85,760.64/x
  3. Step 3: Cross multiply
    112,665.60x = 155,455.20 × 85,760.64
  4. Step 4: Simplify right side
    112,665.60x = 13,331,937,443.33
  5. Step 5: Solve for x
    x = 13,331,937,443.33/112,665.60
  6. Step 6: Final answer
    x = 118,331.93

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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.