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Finding the Fourth Proportional to 121,866.61, 182,726.10 and 79,695.78

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Solution

The fourth proportional to 121,866.61, 182,726.10 and 79,695.78 is: 119,495.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,866.61 : 182,726.10 = 79,695.78 : x
  2. Step 2: Convert to fraction form
    121,866.61/182,726.10 = 79,695.78/x
  3. Step 3: Cross multiply
    121,866.61x = 182,726.10 × 79,695.78
  4. Step 4: Simplify right side
    121,866.61x = 14,562,499,065.86
  5. Step 5: Solve for x
    x = 14,562,499,065.86/121,866.61
  6. Step 6: Final answer
    x = 119,495.40

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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.