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Finding the Fourth Proportional to 92,289.51, 138,430.08 and 25,728.30

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Solution

The fourth proportional to 92,289.51, 138,430.08 and 25,728.30 is: 38,591.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,289.51 : 138,430.08 = 25,728.30 : x
  2. Step 2: Convert to fraction form
    92,289.51/138,430.08 = 25,728.30/x
  3. Step 3: Cross multiply
    92,289.51x = 138,430.08 × 25,728.30
  4. Step 4: Simplify right side
    92,289.51x = 3,561,570,627.26
  5. Step 5: Solve for x
    x = 3,561,570,627.26/92,289.51
  6. Step 6: Final answer
    x = 38,591.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.