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Finding the Fourth Proportional to 100,365.84, 138,494.88 and 57,938.04

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Solution

The fourth proportional to 100,365.84, 138,494.88 and 57,938.04 is: 79,948.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,365.84 : 138,494.88 = 57,938.04 : x
  2. Step 2: Convert to fraction form
    100,365.84/138,494.88 = 57,938.04/x
  3. Step 3: Cross multiply
    100,365.84x = 138,494.88 × 57,938.04
  4. Step 4: Simplify right side
    100,365.84x = 8,024,121,897.24
  5. Step 5: Solve for x
    x = 8,024,121,897.24/100,365.84
  6. Step 6: Final answer
    x = 79,948.73

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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.