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Finding the Fourth Proportional to 98,576.80, 147,865.20 and 39,421.60

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Solution

The fourth proportional to 98,576.80, 147,865.20 and 39,421.60 is: 59,132.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,576.80 : 147,865.20 = 39,421.60 : x
  2. Step 2: Convert to fraction form
    98,576.80/147,865.20 = 39,421.60/x
  3. Step 3: Cross multiply
    98,576.80x = 147,865.20 × 39,421.60
  4. Step 4: Simplify right side
    98,576.80x = 5,829,082,768.32
  5. Step 5: Solve for x
    x = 5,829,082,768.32/98,576.80
  6. Step 6: Final answer
    x = 59,132.40

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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.