Home / 130,971.12-180,741.78-79,287.53

Finding the Fourth Proportional to 130,971.12, 180,741.78 and 79,287.53

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Solution

The fourth proportional to 130,971.12, 180,741.78 and 79,287.53 is: 109,417.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,971.12 : 180,741.78 = 79,287.53 : x
  2. Step 2: Convert to fraction form
    130,971.12/180,741.78 = 79,287.53/x
  3. Step 3: Cross multiply
    130,971.12x = 180,741.78 × 79,287.53
  4. Step 4: Simplify right side
    130,971.12x = 14,330,569,990.49
  5. Step 5: Solve for x
    x = 14,330,569,990.49/130,971.12
  6. Step 6: Final answer
    x = 109,417.78

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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.