Home / 129,141.81-178,381.04-98,742.51

Finding the Fourth Proportional to 129,141.81, 178,381.04 and 98,742.51

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Solution

The fourth proportional to 129,141.81, 178,381.04 and 98,742.51 is: 136,391.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,141.81 : 178,381.04 = 98,742.51 : x
  2. Step 2: Convert to fraction form
    129,141.81/178,381.04 = 98,742.51/x
  3. Step 3: Cross multiply
    129,141.81x = 178,381.04 × 98,742.51
  4. Step 4: Simplify right side
    129,141.81x = 17,613,791,132.30
  5. Step 5: Solve for x
    x = 17,613,791,132.30/129,141.81
  6. Step 6: Final answer
    x = 136,391.08

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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.