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Finding the Fourth Proportional to 128,404.29, 177,202.76 and 70,264.93

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Solution

The fourth proportional to 128,404.29, 177,202.76 and 70,264.93 is: 96,968.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,404.29 : 177,202.76 = 70,264.93 : x
  2. Step 2: Convert to fraction form
    128,404.29/177,202.76 = 70,264.93/x
  3. Step 3: Cross multiply
    128,404.29x = 177,202.76 × 70,264.93
  4. Step 4: Simplify right side
    128,404.29x = 12,451,139,527.21
  5. Step 5: Solve for x
    x = 12,451,139,527.21/128,404.29
  6. Step 6: Final answer
    x = 96,968.25

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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.