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Finding the Fourth Proportional to 128,769.71, 193,207.71 and 69,535.63

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Solution

The fourth proportional to 128,769.71, 193,207.71 and 69,535.63 is: 104,332.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,769.71 : 193,207.71 = 69,535.63 : x
  2. Step 2: Convert to fraction form
    128,769.71/193,207.71 = 69,535.63/x
  3. Step 3: Cross multiply
    128,769.71x = 193,207.71 × 69,535.63
  4. Step 4: Simplify right side
    128,769.71x = 13,434,818,869.67
  5. Step 5: Solve for x
    x = 13,434,818,869.67/128,769.71
  6. Step 6: Final answer
    x = 104,332.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.