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Finding the Fourth Proportional to 128,395.60, 177,230.46 and 88,242.28

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Solution

The fourth proportional to 128,395.60, 177,230.46 and 88,242.28 is: 121,804.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,395.60 : 177,230.46 = 88,242.28 : x
  2. Step 2: Convert to fraction form
    128,395.60/177,230.46 = 88,242.28/x
  3. Step 3: Cross multiply
    128,395.60x = 177,230.46 × 88,242.28
  4. Step 4: Simplify right side
    128,395.60x = 15,639,219,875.85
  5. Step 5: Solve for x
    x = 15,639,219,875.85/128,395.60
  6. Step 6: Final answer
    x = 121,804.95

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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.