Home / 115,636.40-159,519.78-77,397.55

Finding the Fourth Proportional to 115,636.40, 159,519.78 and 77,397.55

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Solution

The fourth proportional to 115,636.40, 159,519.78 and 77,397.55 is: 106,769.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,636.40 : 159,519.78 = 77,397.55 : x
  2. Step 2: Convert to fraction form
    115,636.40/159,519.78 = 77,397.55/x
  3. Step 3: Cross multiply
    115,636.40x = 159,519.78 × 77,397.55
  4. Step 4: Simplify right side
    115,636.40x = 12,346,440,148.54
  5. Step 5: Solve for x
    x = 12,346,440,148.54/115,636.40
  6. Step 6: Final answer
    x = 106,769.50

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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.