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Finding the Fourth Proportional to 128,034.66, 176,670.27 and 71,435.10

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Solution

The fourth proportional to 128,034.66, 176,670.27 and 71,435.10 is: 98,570.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,034.66 : 176,670.27 = 71,435.10 : x
  2. Step 2: Convert to fraction form
    128,034.66/176,670.27 = 71,435.10/x
  3. Step 3: Cross multiply
    128,034.66x = 176,670.27 × 71,435.10
  4. Step 4: Simplify right side
    128,034.66x = 12,620,458,404.48
  5. Step 5: Solve for x
    x = 12,620,458,404.48/128,034.66
  6. Step 6: Final answer
    x = 98,570.64

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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.