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Finding the Fourth Proportional to 98,420.80, 147,631.20 and 97,837.60

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Solution

The fourth proportional to 98,420.80, 147,631.20 and 97,837.60 is: 146,756.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,420.80 : 147,631.20 = 97,837.60 : x
  2. Step 2: Convert to fraction form
    98,420.80/147,631.20 = 97,837.60/x
  3. Step 3: Cross multiply
    98,420.80x = 147,631.20 × 97,837.60
  4. Step 4: Simplify right side
    98,420.80x = 14,443,882,293.12
  5. Step 5: Solve for x
    x = 14,443,882,293.12/98,420.80
  6. Step 6: Final answer
    x = 146,756.40

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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.