Home / 77,127.77-115,359.50-68,639.48

Finding the Fourth Proportional to 77,127.77, 115,359.50 and 68,639.48

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Solution

The fourth proportional to 77,127.77, 115,359.50 and 68,639.48 is: 102,663.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,127.77 : 115,359.50 = 68,639.48 : x
  2. Step 2: Convert to fraction form
    77,127.77/115,359.50 = 68,639.48/x
  3. Step 3: Cross multiply
    77,127.77x = 115,359.50 × 68,639.48
  4. Step 4: Simplify right side
    77,127.77x = 7,918,215,173.07
  5. Step 5: Solve for x
    x = 7,918,215,173.07/77,127.77
  6. Step 6: Final answer
    x = 102,663.62

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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.