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Finding the Fourth Proportional to 90,188.94, 124,510.79 and 54,388.02

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Solution

The fourth proportional to 90,188.94, 124,510.79 and 54,388.02 is: 75,085.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,188.94 : 124,510.79 = 54,388.02 : x
  2. Step 2: Convert to fraction form
    90,188.94/124,510.79 = 54,388.02/x
  3. Step 3: Cross multiply
    90,188.94x = 124,510.79 × 54,388.02
  4. Step 4: Simplify right side
    90,188.94x = 6,771,895,336.74
  5. Step 5: Solve for x
    x = 6,771,895,336.74/90,188.94
  6. Step 6: Final answer
    x = 75,085.65

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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.