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Finding the Fourth Proportional to 421,370.30, 632,073.92 and 121,881.16

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Solution

The fourth proportional to 421,370.30, 632,073.92 and 121,881.16 is: 182,827.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,370.30 : 632,073.92 = 121,881.16 : x
  2. Step 2: Convert to fraction form
    421,370.30/632,073.92 = 121,881.16/x
  3. Step 3: Cross multiply
    421,370.30x = 632,073.92 × 121,881.16
  4. Step 4: Simplify right side
    421,370.30x = 77,037,900,385.76
  5. Step 5: Solve for x
    x = 77,037,900,385.76/421,370.30
  6. Step 6: Final answer
    x = 182,827.08

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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.