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Finding the Fourth Proportional to 98,861.60, 148,090.80 and 61,306.40

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Solution

The fourth proportional to 98,861.60, 148,090.80 and 61,306.40 is: 91,834.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,861.60 : 148,090.80 = 61,306.40 : x
  2. Step 2: Convert to fraction form
    98,861.60/148,090.80 = 61,306.40/x
  3. Step 3: Cross multiply
    98,861.60x = 148,090.80 × 61,306.40
  4. Step 4: Simplify right side
    98,861.60x = 9,078,913,821.12
  5. Step 5: Solve for x
    x = 9,078,913,821.12/98,861.60
  6. Step 6: Final answer
    x = 91,834.58

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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.