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Finding the Fourth Proportional to 98,389, 147,597.90 and 31,807

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Solution

The fourth proportional to 98,389, 147,597.90 and 31,807 is: 47,715.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,389 : 147,597.90 = 31,807 : x
  2. Step 2: Convert to fraction form
    98,389/147,597.90 = 31,807/x
  3. Step 3: Cross multiply
    98,389x = 147,597.90 × 31,807
  4. Step 4: Simplify right side
    98,389x = 4,694,646,405.30
  5. Step 5: Solve for x
    x = 4,694,646,405.30/98,389
  6. Step 6: Final answer
    x = 47,715.16

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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.