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Finding the Fourth Proportional to 90,857.63, 125,349.89 and 90,717.50

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Solution

The fourth proportional to 90,857.63, 125,349.89 and 90,717.50 is: 125,156.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,857.63 : 125,349.89 = 90,717.50 : x
  2. Step 2: Convert to fraction form
    90,857.63/125,349.89 = 90,717.50/x
  3. Step 3: Cross multiply
    90,857.63x = 125,349.89 × 90,717.50
  4. Step 4: Simplify right side
    90,857.63x = 11,371,428,192.49
  5. Step 5: Solve for x
    x = 11,371,428,192.49/90,857.63
  6. Step 6: Final answer
    x = 125,156.56

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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.