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Finding the Fourth Proportional to 100,590.63, 138,875.92 and 66,628.24

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Solution

The fourth proportional to 100,590.63, 138,875.92 and 66,628.24 is: 91,987.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,590.63 : 138,875.92 = 66,628.24 : x
  2. Step 2: Convert to fraction form
    100,590.63/138,875.92 = 66,628.24/x
  3. Step 3: Cross multiply
    100,590.63x = 138,875.92 × 66,628.24
  4. Step 4: Simplify right side
    100,590.63x = 9,253,057,614.22
  5. Step 5: Solve for x
    x = 9,253,057,614.22/100,590.63
  6. Step 6: Final answer
    x = 91,987.28

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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.