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Finding the Fourth Proportional to 100,357.68, 138,483.62 and 57,929.88

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Solution

The fourth proportional to 100,357.68, 138,483.62 and 57,929.88 is: 79,937.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,357.68 : 138,483.62 = 57,929.88 : x
  2. Step 2: Convert to fraction form
    100,357.68/138,483.62 = 57,929.88/x
  3. Step 3: Cross multiply
    100,357.68x = 138,483.62 × 57,929.88
  4. Step 4: Simplify right side
    100,357.68x = 8,022,340,261.32
  5. Step 5: Solve for x
    x = 8,022,340,261.32/100,357.68
  6. Step 6: Final answer
    x = 79,937.48

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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.