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Finding the Fourth Proportional to 99,988.96, 149,711.10 and 70,362.40

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Solution

The fourth proportional to 99,988.96, 149,711.10 and 70,362.40 is: 105,351.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,988.96 : 149,711.10 = 70,362.40 : x
  2. Step 2: Convert to fraction form
    99,988.96/149,711.10 = 70,362.40/x
  3. Step 3: Cross multiply
    99,988.96x = 149,711.10 × 70,362.40
  4. Step 4: Simplify right side
    99,988.96x = 10,534,032,302.64
  5. Step 5: Solve for x
    x = 10,534,032,302.64/99,988.96
  6. Step 6: Final answer
    x = 105,351.95

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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.