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Finding the Fourth Proportional to 88,434.88, 121,769.88 and 66,662.80

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Solution

The fourth proportional to 88,434.88, 121,769.88 and 66,662.80 is: 91,790.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,434.88 : 121,769.88 = 66,662.80 : x
  2. Step 2: Convert to fraction form
    88,434.88/121,769.88 = 66,662.80/x
  3. Step 3: Cross multiply
    88,434.88x = 121,769.88 × 66,662.80
  4. Step 4: Simplify right side
    88,434.88x = 8,117,521,156.46
  5. Step 5: Solve for x
    x = 8,117,521,156.46/88,434.88
  6. Step 6: Final answer
    x = 91,790.94

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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.