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Finding the Fourth Proportional to 99,336.80, 149,031.60 and 43,152.80

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Solution

The fourth proportional to 99,336.80, 149,031.60 and 43,152.80 is: 64,740.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,336.80 : 149,031.60 = 43,152.80 : x
  2. Step 2: Convert to fraction form
    99,336.80/149,031.60 = 43,152.80/x
  3. Step 3: Cross multiply
    99,336.80x = 149,031.60 × 43,152.80
  4. Step 4: Simplify right side
    99,336.80x = 6,431,130,828.48
  5. Step 5: Solve for x
    x = 6,431,130,828.48/99,336.80
  6. Step 6: Final answer
    x = 64,740.67

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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.