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Finding the Fourth Proportional to 128,223.98, 176,939.81 and 70,862.61

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Solution

The fourth proportional to 128,223.98, 176,939.81 and 70,862.61 is: 97,785.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,223.98 : 176,939.81 = 70,862.61 : x
  2. Step 2: Convert to fraction form
    128,223.98/176,939.81 = 70,862.61/x
  3. Step 3: Cross multiply
    128,223.98x = 176,939.81 × 70,862.61
  4. Step 4: Simplify right side
    128,223.98x = 12,538,416,395.19
  5. Step 5: Solve for x
    x = 12,538,416,395.19/128,223.98
  6. Step 6: Final answer
    x = 97,785.27

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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.