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Finding the Fourth Proportional to 100,595.48, 138,824.74 and 55,276.28

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Solution

The fourth proportional to 100,595.48, 138,824.74 and 55,276.28 is: 76,282.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,595.48 : 138,824.74 = 55,276.28 : x
  2. Step 2: Convert to fraction form
    100,595.48/138,824.74 = 55,276.28/x
  3. Step 3: Cross multiply
    100,595.48x = 138,824.74 × 55,276.28
  4. Step 4: Simplify right side
    100,595.48x = 7,673,715,199.17
  5. Step 5: Solve for x
    x = 7,673,715,199.17/100,595.48
  6. Step 6: Final answer
    x = 76,282.90

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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.