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Finding the Fourth Proportional to 100,365.66, 138,510.74 and 57,926.92

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Solution

The fourth proportional to 100,365.66, 138,510.74 and 57,926.92 is: 79,942.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,365.66 : 138,510.74 = 57,926.92 : x
  2. Step 2: Convert to fraction form
    100,365.66/138,510.74 = 57,926.92/x
  3. Step 3: Cross multiply
    100,365.66x = 138,510.74 × 57,926.92
  4. Step 4: Simplify right side
    100,365.66x = 8,023,500,555.12
  5. Step 5: Solve for x
    x = 8,023,500,555.12/100,365.66
  6. Step 6: Final answer
    x = 79,942.69

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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.