Home / 128,373.40-177,160.13-71,784.64

Finding the Fourth Proportional to 128,373.40, 177,160.13 and 71,784.64

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Solution

The fourth proportional to 128,373.40, 177,160.13 and 71,784.64 is: 99,065.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,373.40 : 177,160.13 = 71,784.64 : x
  2. Step 2: Convert to fraction form
    128,373.40/177,160.13 = 71,784.64/x
  3. Step 3: Cross multiply
    128,373.40x = 177,160.13 × 71,784.64
  4. Step 4: Simplify right side
    128,373.40x = 12,717,376,154.40
  5. Step 5: Solve for x
    x = 12,717,376,154.40/128,373.40
  6. Step 6: Final answer
    x = 99,065.51

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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.