Home / 138,742.79-191,465.04-75,080.59

Finding the Fourth Proportional to 138,742.79, 191,465.04 and 75,080.59

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Solution

The fourth proportional to 138,742.79, 191,465.04 and 75,080.59 is: 103,611.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,742.79 : 191,465.04 = 75,080.59 : x
  2. Step 2: Convert to fraction form
    138,742.79/191,465.04 = 75,080.59/x
  3. Step 3: Cross multiply
    138,742.79x = 191,465.04 × 75,080.59
  4. Step 4: Simplify right side
    138,742.79x = 14,375,307,970.46
  5. Step 5: Solve for x
    x = 14,375,307,970.46/138,742.79
  6. Step 6: Final answer
    x = 103,611.21

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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.