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Finding the Fourth Proportional to 100,397.60, 138,608.72 and 62,722.88

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Solution

The fourth proportional to 100,397.60, 138,608.72 and 62,722.88 is: 86,595.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,397.60 : 138,608.72 = 62,722.88 : x
  2. Step 2: Convert to fraction form
    100,397.60/138,608.72 = 62,722.88/x
  3. Step 3: Cross multiply
    100,397.60x = 138,608.72 × 62,722.88
  4. Step 4: Simplify right side
    100,397.60x = 8,693,938,111.51
  5. Step 5: Solve for x
    x = 8,693,938,111.51/100,397.60
  6. Step 6: Final answer
    x = 86,595.08

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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.