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Finding the Fourth Proportional to 100,561.69, 138,776.02 and 55,240.59

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Solution

The fourth proportional to 100,561.69, 138,776.02 and 55,240.59 is: 76,232.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,561.69 : 138,776.02 = 55,240.59 : x
  2. Step 2: Convert to fraction form
    100,561.69/138,776.02 = 55,240.59/x
  3. Step 3: Cross multiply
    100,561.69x = 138,776.02 × 55,240.59
  4. Step 4: Simplify right side
    100,561.69x = 7,666,069,222.65
  5. Step 5: Solve for x
    x = 7,666,069,222.65/100,561.69
  6. Step 6: Final answer
    x = 76,232.50

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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.