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Finding the Fourth Proportional to 99,914.96, 149,143.54 and 87,303.50

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Solution

The fourth proportional to 99,914.96, 149,143.54 and 87,303.50 is: 130,318.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,914.96 : 149,143.54 = 87,303.50 : x
  2. Step 2: Convert to fraction form
    99,914.96/149,143.54 = 87,303.50/x
  3. Step 3: Cross multiply
    99,914.96x = 149,143.54 × 87,303.50
  4. Step 4: Simplify right side
    99,914.96x = 13,020,753,044.39
  5. Step 5: Solve for x
    x = 13,020,753,044.39/99,914.96
  6. Step 6: Final answer
    x = 130,318.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.