Home / 128,515.28-177,344.56-70,370.40

Finding the Fourth Proportional to 128,515.28, 177,344.56 and 70,370.40

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Solution

The fourth proportional to 128,515.28, 177,344.56 and 70,370.40 is: 97,107.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,515.28 : 177,344.56 = 70,370.40 : x
  2. Step 2: Convert to fraction form
    128,515.28/177,344.56 = 70,370.40/x
  3. Step 3: Cross multiply
    128,515.28x = 177,344.56 × 70,370.40
  4. Step 4: Simplify right side
    128,515.28x = 12,479,807,625.02
  5. Step 5: Solve for x
    x = 12,479,807,625.02/128,515.28
  6. Step 6: Final answer
    x = 97,107.58

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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.