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Finding the Fourth Proportional to 138,762.43, 191,492.72 and 75,100.21

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Solution

The fourth proportional to 138,762.43, 191,492.72 and 75,100.21 is: 103,638.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,762.43 : 191,492.72 = 75,100.21 : x
  2. Step 2: Convert to fraction form
    138,762.43/191,492.72 = 75,100.21/x
  3. Step 3: Cross multiply
    138,762.43x = 191,492.72 × 75,100.21
  4. Step 4: Simplify right side
    138,762.43x = 14,381,143,109.97
  5. Step 5: Solve for x
    x = 14,381,143,109.97/138,762.43
  6. Step 6: Final answer
    x = 103,638.59

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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.