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Finding the Fourth Proportional to 98,530.40, 147,817.20 and 31,959.20

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Solution

The fourth proportional to 98,530.40, 147,817.20 and 31,959.20 is: 47,945.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,530.40 : 147,817.20 = 31,959.20 : x
  2. Step 2: Convert to fraction form
    98,530.40/147,817.20 = 31,959.20/x
  3. Step 3: Cross multiply
    98,530.40x = 147,817.20 × 31,959.20
  4. Step 4: Simplify right side
    98,530.40x = 4,724,119,458.24
  5. Step 5: Solve for x
    x = 4,724,119,458.24/98,530.40
  6. Step 6: Final answer
    x = 47,945.81

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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.