Home / 128,118.15-176,799.38-71,528.31

Finding the Fourth Proportional to 128,118.15, 176,799.38 and 71,528.31

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Solution

The fourth proportional to 128,118.15, 176,799.38 and 71,528.31 is: 98,707.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,118.15 : 176,799.38 = 71,528.31 : x
  2. Step 2: Convert to fraction form
    128,118.15/176,799.38 = 71,528.31/x
  3. Step 3: Cross multiply
    128,118.15x = 176,799.38 × 71,528.31
  4. Step 4: Simplify right side
    128,118.15x = 12,646,160,502.81
  5. Step 5: Solve for x
    x = 12,646,160,502.81/128,118.15
  6. Step 6: Final answer
    x = 98,707.02

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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.