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Finding the Fourth Proportional to 91,609.63, 138,038.45 and 75,334.21

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Solution

The fourth proportional to 91,609.63, 138,038.45 and 75,334.21 is: 113,514.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,609.63 : 138,038.45 = 75,334.21 : x
  2. Step 2: Convert to fraction form
    91,609.63/138,038.45 = 75,334.21/x
  3. Step 3: Cross multiply
    91,609.63x = 138,038.45 × 75,334.21
  4. Step 4: Simplify right side
    91,609.63x = 10,399,017,580.37
  5. Step 5: Solve for x
    x = 10,399,017,580.37/91,609.63
  6. Step 6: Final answer
    x = 113,514.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.