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Finding the Fourth Proportional to 100,528.65, 138,733.23 and 55,210.82

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Solution

The fourth proportional to 100,528.65, 138,733.23 and 55,210.82 is: 76,192.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,528.65 : 138,733.23 = 55,210.82 : x
  2. Step 2: Convert to fraction form
    100,528.65/138,733.23 = 55,210.82/x
  3. Step 3: Cross multiply
    100,528.65x = 138,733.23 × 55,210.82
  4. Step 4: Simplify right side
    100,528.65x = 7,659,575,423.17
  5. Step 5: Solve for x
    x = 7,659,575,423.17/100,528.65
  6. Step 6: Final answer
    x = 76,192.96

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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.