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Finding the Fourth Proportional to 243,339.90, 364,945.05 and 74,859.90

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Solution

The fourth proportional to 243,339.90, 364,945.05 and 74,859.90 is: 112,269.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,339.90 : 364,945.05 = 74,859.90 : x
  2. Step 2: Convert to fraction form
    243,339.90/364,945.05 = 74,859.90/x
  3. Step 3: Cross multiply
    243,339.90x = 364,945.05 × 74,859.90
  4. Step 4: Simplify right side
    243,339.90x = 27,319,749,948.50
  5. Step 5: Solve for x
    x = 27,319,749,948.50/243,339.90
  6. Step 6: Final answer
    x = 112,269.92

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1.5x scale

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.