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Finding the Fourth Proportional to 90,215.61, 124,495.80 and 49,929.39

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Solution

The fourth proportional to 90,215.61, 124,495.80 and 49,929.39 is: 68,901.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,215.61 : 124,495.80 = 49,929.39 : x
  2. Step 2: Convert to fraction form
    90,215.61/124,495.80 = 49,929.39/x
  3. Step 3: Cross multiply
    90,215.61x = 124,495.80 × 49,929.39
  4. Step 4: Simplify right side
    90,215.61x = 6,215,999,351.56
  5. Step 5: Solve for x
    x = 6,215,999,351.56/90,215.61
  6. Step 6: Final answer
    x = 68,901.59

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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.