Home / 128,449.47-177,257.43-70,305.91

Finding the Fourth Proportional to 128,449.47, 177,257.43 and 70,305.91

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Solution

The fourth proportional to 128,449.47, 177,257.43 and 70,305.91 is: 97,020.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,449.47 : 177,257.43 = 70,305.91 : x
  2. Step 2: Convert to fraction form
    128,449.47/177,257.43 = 70,305.91/x
  3. Step 3: Cross multiply
    128,449.47x = 177,257.43 × 70,305.91
  4. Step 4: Simplify right side
    128,449.47x = 12,462,244,920.41
  5. Step 5: Solve for x
    x = 12,462,244,920.41/128,449.47
  6. Step 6: Final answer
    x = 97,020.60

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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.