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Finding the Fourth Proportional to 75,155.65, 103,712.70 and 42,889.65

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Solution

The fourth proportional to 75,155.65, 103,712.70 and 42,889.65 is: 59,186.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,155.65 : 103,712.70 = 42,889.65 : x
  2. Step 2: Convert to fraction form
    75,155.65/103,712.70 = 42,889.65/x
  3. Step 3: Cross multiply
    75,155.65x = 103,712.70 × 42,889.65
  4. Step 4: Simplify right side
    75,155.65x = 4,448,201,758.85
  5. Step 5: Solve for x
    x = 4,448,201,758.85/75,155.65
  6. Step 6: Final answer
    x = 59,186.53

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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.