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Finding the Fourth Proportional to 128,101.64, 176,729.46 and 85,592.84

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Solution

The fourth proportional to 128,101.64, 176,729.46 and 85,592.84 is: 118,084.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,101.64 : 176,729.46 = 85,592.84 : x
  2. Step 2: Convert to fraction form
    128,101.64/176,729.46 = 85,592.84/x
  3. Step 3: Cross multiply
    128,101.64x = 176,729.46 × 85,592.84
  4. Step 4: Simplify right side
    128,101.64x = 15,126,776,393.07
  5. Step 5: Solve for x
    x = 15,126,776,393.07/128,101.64
  6. Step 6: Final answer
    x = 118,084.17

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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.