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Finding the Fourth Proportional to 128,243.25, 176,970.42 and 74,527.83

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Solution

The fourth proportional to 128,243.25, 176,970.42 and 74,527.83 is: 102,845.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,243.25 : 176,970.42 = 74,527.83 : x
  2. Step 2: Convert to fraction form
    128,243.25/176,970.42 = 74,527.83/x
  3. Step 3: Cross multiply
    128,243.25x = 176,970.42 × 74,527.83
  4. Step 4: Simplify right side
    128,243.25x = 13,189,221,376.79
  5. Step 5: Solve for x
    x = 13,189,221,376.79/128,243.25
  6. Step 6: Final answer
    x = 102,845.35

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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.