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Finding the Fourth Proportional to 146,436.80, 219,655.20 and 87,339.20

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Solution

The fourth proportional to 146,436.80, 219,655.20 and 87,339.20 is: 131,008.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,436.80 : 219,655.20 = 87,339.20 : x
  2. Step 2: Convert to fraction form
    146,436.80/219,655.20 = 87,339.20/x
  3. Step 3: Cross multiply
    146,436.80x = 219,655.20 × 87,339.20
  4. Step 4: Simplify right side
    146,436.80x = 19,184,509,443.84
  5. Step 5: Solve for x
    x = 19,184,509,443.84/146,436.80
  6. Step 6: Final answer
    x = 131,008.80

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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.