Home / 119,778.40-165,200.88-77,347.36

Finding the Fourth Proportional to 119,778.40, 165,200.88 and 77,347.36

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Solution

The fourth proportional to 119,778.40, 165,200.88 and 77,347.36 is: 106,679.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,778.40 : 165,200.88 = 77,347.36 : x
  2. Step 2: Convert to fraction form
    119,778.40/165,200.88 = 77,347.36/x
  3. Step 3: Cross multiply
    119,778.40x = 165,200.88 × 77,347.36
  4. Step 4: Simplify right side
    119,778.40x = 12,777,851,937.68
  5. Step 5: Solve for x
    x = 12,777,851,937.68/119,778.40
  6. Step 6: Final answer
    x = 106,679.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.