Home / 130,572.81-180,121.73-79,573.19

Finding the Fourth Proportional to 130,572.81, 180,121.73 and 79,573.19

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Solution

The fourth proportional to 130,572.81, 180,121.73 and 79,573.19 is: 109,769.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,572.81 : 180,121.73 = 79,573.19 : x
  2. Step 2: Convert to fraction form
    130,572.81/180,121.73 = 79,573.19/x
  3. Step 3: Cross multiply
    130,572.81x = 180,121.73 × 79,573.19
  4. Step 4: Simplify right side
    130,572.81x = 14,332,859,345.94
  5. Step 5: Solve for x
    x = 14,332,859,345.94/130,572.81
  6. Step 6: Final answer
    x = 109,769.10

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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.