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Finding the Fourth Proportional to 99,752.40, 149,409.90 and 86,630.40

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Solution

The fourth proportional to 99,752.40, 149,409.90 and 86,630.40 is: 129,755.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,752.40 : 149,409.90 = 86,630.40 : x
  2. Step 2: Convert to fraction form
    99,752.40/149,409.90 = 86,630.40/x
  3. Step 3: Cross multiply
    99,752.40x = 149,409.90 × 86,630.40
  4. Step 4: Simplify right side
    99,752.40x = 12,943,439,400.96
  5. Step 5: Solve for x
    x = 12,943,439,400.96/99,752.40
  6. Step 6: Final answer
    x = 129,755.67

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1.5x scale

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.