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Finding the Fourth Proportional to 90,672.45, 127,072.65 and 90,672.45

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Solution

The fourth proportional to 90,672.45, 127,072.65 and 90,672.45 is: 127,072.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,672.45 : 127,072.65 = 90,672.45 : x
  2. Step 2: Convert to fraction form
    90,672.45/127,072.65 = 90,672.45/x
  3. Step 3: Cross multiply
    90,672.45x = 127,072.65 × 90,672.45
  4. Step 4: Simplify right side
    90,672.45x = 11,521,988,503.49
  5. Step 5: Solve for x
    x = 11,521,988,503.49/90,672.45
  6. Step 6: Final answer
    x = 127,072.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.