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Finding the Fourth Proportional to 90,145.92, 124,386.51 and 49,851.81

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Solution

The fourth proportional to 90,145.92, 124,386.51 and 49,851.81 is: 68,787.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,145.92 : 124,386.51 = 49,851.81 : x
  2. Step 2: Convert to fraction form
    90,145.92/124,386.51 = 49,851.81/x
  3. Step 3: Cross multiply
    90,145.92x = 124,386.51 × 49,851.81
  4. Step 4: Simplify right side
    90,145.92x = 6,200,892,663.08
  5. Step 5: Solve for x
    x = 6,200,892,663.08/90,145.92
  6. Step 6: Final answer
    x = 68,787.28

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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.