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Finding the Fourth Proportional to 147,939.20, 221,779.20 and 88,798.40

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Solution

The fourth proportional to 147,939.20, 221,779.20 and 88,798.40 is: 133,119.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,939.20 : 221,779.20 = 88,798.40 : x
  2. Step 2: Convert to fraction form
    147,939.20/221,779.20 = 88,798.40/x
  3. Step 3: Cross multiply
    147,939.20x = 221,779.20 × 88,798.40
  4. Step 4: Simplify right side
    147,939.20x = 19,693,638,113.28
  5. Step 5: Solve for x
    x = 19,693,638,113.28/147,939.20
  6. Step 6: Final answer
    x = 133,119.81

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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.