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Finding the Fourth Proportional to 128,776.65, 177,704.51 and 75,070.41

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Solution

The fourth proportional to 128,776.65, 177,704.51 and 75,070.41 is: 103,592.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,776.65 : 177,704.51 = 75,070.41 : x
  2. Step 2: Convert to fraction form
    128,776.65/177,704.51 = 75,070.41/x
  3. Step 3: Cross multiply
    128,776.65x = 177,704.51 × 75,070.41
  4. Step 4: Simplify right side
    128,776.65x = 13,340,350,424.55
  5. Step 5: Solve for x
    x = 13,340,350,424.55/128,776.65
  6. Step 6: Final answer
    x = 103,592.93

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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.