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Finding the Fourth Proportional to 135,119.87, 186,457.32 and 74,686.91

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Solution

The fourth proportional to 135,119.87, 186,457.32 and 74,686.91 is: 103,063.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,119.87 : 186,457.32 = 74,686.91 : x
  2. Step 2: Convert to fraction form
    135,119.87/186,457.32 = 74,686.91/x
  3. Step 3: Cross multiply
    135,119.87x = 186,457.32 × 74,686.91
  4. Step 4: Simplify right side
    135,119.87x = 13,925,920,984.16
  5. Step 5: Solve for x
    x = 13,925,920,984.16/135,119.87
  6. Step 6: Final answer
    x = 103,063.46

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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.