Home / 109,289.80-163,934.70-99,440.20

Finding the Fourth Proportional to 109,289.80, 163,934.70 and 99,440.20

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Solution

The fourth proportional to 109,289.80, 163,934.70 and 99,440.20 is: 149,160.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,289.80 : 163,934.70 = 99,440.20 : x
  2. Step 2: Convert to fraction form
    109,289.80/163,934.70 = 99,440.20/x
  3. Step 3: Cross multiply
    109,289.80x = 163,934.70 × 99,440.20
  4. Step 4: Simplify right side
    109,289.80x = 16,301,699,354.94
  5. Step 5: Solve for x
    x = 16,301,699,354.94/109,289.80
  6. Step 6: Final answer
    x = 149,160.30

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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.