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Finding the Fourth Proportional to 135,911.61, 187,551.63 and 75,486.15

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Solution

The fourth proportional to 135,911.61, 187,551.63 and 75,486.15 is: 104,167.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,911.61 : 187,551.63 = 75,486.15 : x
  2. Step 2: Convert to fraction form
    135,911.61/187,551.63 = 75,486.15/x
  3. Step 3: Cross multiply
    135,911.61x = 187,551.63 × 75,486.15
  4. Step 4: Simplify right side
    135,911.61x = 14,157,550,474.92
  5. Step 5: Solve for x
    x = 14,157,550,474.92/135,911.61
  6. Step 6: Final answer
    x = 104,167.34

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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.