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Finding the Fourth Proportional to 80,955.61, 121,326.80 and 45,416.25

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Solution

The fourth proportional to 80,955.61, 121,326.80 and 45,416.25 is: 68,064.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,955.61 : 121,326.80 = 45,416.25 : x
  2. Step 2: Convert to fraction form
    80,955.61/121,326.80 = 45,416.25/x
  3. Step 3: Cross multiply
    80,955.61x = 121,326.80 × 45,416.25
  4. Step 4: Simplify right side
    80,955.61x = 5,510,208,053.42
  5. Step 5: Solve for x
    x = 5,510,208,053.42/80,955.61
  6. Step 6: Final answer
    x = 68,064.56

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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.