Home / 121,007.72-166,846.02-78,550.76

Finding the Fourth Proportional to 121,007.72, 166,846.02 and 78,550.76

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Solution

The fourth proportional to 121,007.72, 166,846.02 and 78,550.76 is: 108,306.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,007.72 : 166,846.02 = 78,550.76 : x
  2. Step 2: Convert to fraction form
    121,007.72/166,846.02 = 78,550.76/x
  3. Step 3: Cross multiply
    121,007.72x = 166,846.02 × 78,550.76
  4. Step 4: Simplify right side
    121,007.72x = 13,105,881,673.98
  5. Step 5: Solve for x
    x = 13,105,881,673.98/121,007.72
  6. Step 6: Final answer
    x = 108,306.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.