Home / 128,255.17-176,991.59-71,666.54

Finding the Fourth Proportional to 128,255.17, 176,991.59 and 71,666.54

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Solution

The fourth proportional to 128,255.17, 176,991.59 and 71,666.54 is: 98,899.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,255.17 : 176,991.59 = 71,666.54 : x
  2. Step 2: Convert to fraction form
    128,255.17/176,991.59 = 71,666.54/x
  3. Step 3: Cross multiply
    128,255.17x = 176,991.59 × 71,666.54
  4. Step 4: Simplify right side
    128,255.17x = 12,684,374,506.07
  5. Step 5: Solve for x
    x = 12,684,374,506.07/128,255.17
  6. Step 6: Final answer
    x = 98,899.52

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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.