Home / 77,011.20-115,292.16-69,007.68

Finding the Fourth Proportional to 77,011.20, 115,292.16 and 69,007.68

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Solution

The fourth proportional to 77,011.20, 115,292.16 and 69,007.68 is: 103,310.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,011.20 : 115,292.16 = 69,007.68 : x
  2. Step 2: Convert to fraction form
    77,011.20/115,292.16 = 69,007.68/x
  3. Step 3: Cross multiply
    77,011.20x = 115,292.16 × 69,007.68
  4. Step 4: Simplify right side
    77,011.20x = 7,956,044,483.79
  5. Step 5: Solve for x
    x = 7,956,044,483.79/77,011.20
  6. Step 6: Final answer
    x = 103,310.23

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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.