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Finding the Fourth Proportional to 75,393.61, 112,959.64 and 45,749.16

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Solution

The fourth proportional to 75,393.61, 112,959.64 and 45,749.16 is: 68,544.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,393.61 : 112,959.64 = 45,749.16 : x
  2. Step 2: Convert to fraction form
    75,393.61/112,959.64 = 45,749.16/x
  3. Step 3: Cross multiply
    75,393.61x = 112,959.64 × 45,749.16
  4. Step 4: Simplify right side
    75,393.61x = 5,167,808,643.90
  5. Step 5: Solve for x
    x = 5,167,808,643.90/75,393.61
  6. Step 6: Final answer
    x = 68,544.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.