Home / 135,639.89-187,187.67-75,207

Finding the Fourth Proportional to 135,639.89, 187,187.67 and 75,207

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Solution

The fourth proportional to 135,639.89, 187,187.67 and 75,207 is: 103,788.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,639.89 : 187,187.67 = 75,207 : x
  2. Step 2: Convert to fraction form
    135,639.89/187,187.67 = 75,207/x
  3. Step 3: Cross multiply
    135,639.89x = 187,187.67 × 75,207
  4. Step 4: Simplify right side
    135,639.89x = 14,077,823,097.69
  5. Step 5: Solve for x
    x = 14,077,823,097.69/135,639.89
  6. Step 6: Final answer
    x = 103,788.23

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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.