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Finding the Fourth Proportional to 128,072.38, 176,741.70 and 71,483.75

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Solution

The fourth proportional to 128,072.38, 176,741.70 and 71,483.75 is: 98,648.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,072.38 : 176,741.70 = 71,483.75 : x
  2. Step 2: Convert to fraction form
    128,072.38/176,741.70 = 71,483.75/x
  3. Step 3: Cross multiply
    128,072.38x = 176,741.70 × 71,483.75
  4. Step 4: Simplify right side
    128,072.38x = 12,634,159,497.38
  5. Step 5: Solve for x
    x = 12,634,159,497.38/128,072.38
  6. Step 6: Final answer
    x = 98,648.59

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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.