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Finding the Fourth Proportional to 135,315.48, 186,730.75 and 74,888.67

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Solution

The fourth proportional to 135,315.48, 186,730.75 and 74,888.67 is: 103,343.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,315.48 : 186,730.75 = 74,888.67 : x
  2. Step 2: Convert to fraction form
    135,315.48/186,730.75 = 74,888.67/x
  3. Step 3: Cross multiply
    135,315.48x = 186,730.75 × 74,888.67
  4. Step 4: Simplify right side
    135,315.48x = 13,984,016,394.73
  5. Step 5: Solve for x
    x = 13,984,016,394.73/135,315.48
  6. Step 6: Final answer
    x = 103,343.81

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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.