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Finding the Fourth Proportional to 98,607.80, 147,911.70 and 43,311.80

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Solution

The fourth proportional to 98,607.80, 147,911.70 and 43,311.80 is: 64,967.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,607.80 : 147,911.70 = 43,311.80 : x
  2. Step 2: Convert to fraction form
    98,607.80/147,911.70 = 43,311.80/x
  3. Step 3: Cross multiply
    98,607.80x = 147,911.70 × 43,311.80
  4. Step 4: Simplify right side
    98,607.80x = 6,406,321,968.06
  5. Step 5: Solve for x
    x = 6,406,321,968.06/98,607.80
  6. Step 6: Final answer
    x = 64,967.70

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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.