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Finding the Fourth Proportional to 100,353.82, 138,424.80 and 64,482.16

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Solution

The fourth proportional to 100,353.82, 138,424.80 and 64,482.16 is: 88,944.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,353.82 : 138,424.80 = 64,482.16 : x
  2. Step 2: Convert to fraction form
    100,353.82/138,424.80 = 64,482.16/x
  3. Step 3: Cross multiply
    100,353.82x = 138,424.80 × 64,482.16
  4. Step 4: Simplify right side
    100,353.82x = 8,925,930,101.57
  5. Step 5: Solve for x
    x = 8,925,930,101.57/100,353.82
  6. Step 6: Final answer
    x = 88,944.60

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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.