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Finding the Fourth Proportional to 86,752.80, 130,420.80 and 73,922.40

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Solution

The fourth proportional to 86,752.80, 130,420.80 and 73,922.40 is: 111,132.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,752.80 : 130,420.80 = 73,922.40 : x
  2. Step 2: Convert to fraction form
    86,752.80/130,420.80 = 73,922.40/x
  3. Step 3: Cross multiply
    86,752.80x = 130,420.80 × 73,922.40
  4. Step 4: Simplify right side
    86,752.80x = 9,641,018,545.92
  5. Step 5: Solve for x
    x = 9,641,018,545.92/86,752.80
  6. Step 6: Final answer
    x = 111,132.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.