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Finding the Fourth Proportional to 90,393.78, 124,730.31 and 50,107.53

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Solution

The fourth proportional to 90,393.78, 124,730.31 and 50,107.53 is: 69,141.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,393.78 : 124,730.31 = 50,107.53 : x
  2. Step 2: Convert to fraction form
    90,393.78/124,730.31 = 50,107.53/x
  3. Step 3: Cross multiply
    90,393.78x = 124,730.31 × 50,107.53
  4. Step 4: Simplify right side
    90,393.78x = 6,249,927,750.23
  5. Step 5: Solve for x
    x = 6,249,927,750.23/90,393.78
  6. Step 6: Final answer
    x = 69,141.13

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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.