Home / 100,318.64-138,442.29-56,707.68

Finding the Fourth Proportional to 100,318.64, 138,442.29 and 56,707.68

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Solution

The fourth proportional to 100,318.64, 138,442.29 and 56,707.68 is: 78,258.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,318.64 : 138,442.29 = 56,707.68 : x
  2. Step 2: Convert to fraction form
    100,318.64/138,442.29 = 56,707.68/x
  3. Step 3: Cross multiply
    100,318.64x = 138,442.29 × 56,707.68
  4. Step 4: Simplify right side
    100,318.64x = 7,850,741,079.79
  5. Step 5: Solve for x
    x = 7,850,741,079.79/100,318.64
  6. Step 6: Final answer
    x = 78,258.05

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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.