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Finding the Fourth Proportional to 121,686.66, 182,085.90 and 71,790.66

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Solution

The fourth proportional to 121,686.66, 182,085.90 and 71,790.66 is: 107,423.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,686.66 : 182,085.90 = 71,790.66 : x
  2. Step 2: Convert to fraction form
    121,686.66/182,085.90 = 71,790.66/x
  3. Step 3: Cross multiply
    121,686.66x = 182,085.90 × 71,790.66
  4. Step 4: Simplify right side
    121,686.66x = 13,072,066,937.69
  5. Step 5: Solve for x
    x = 13,072,066,937.69/121,686.66
  6. Step 6: Final answer
    x = 107,423.99

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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.