Home / 77,121.33-106,428.24-45,290.76

Finding the Fourth Proportional to 77,121.33, 106,428.24 and 45,290.76

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Solution

The fourth proportional to 77,121.33, 106,428.24 and 45,290.76 is: 62,501.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,121.33 : 106,428.24 = 45,290.76 : x
  2. Step 2: Convert to fraction form
    77,121.33/106,428.24 = 45,290.76/x
  3. Step 3: Cross multiply
    77,121.33x = 106,428.24 × 45,290.76
  4. Step 4: Simplify right side
    77,121.33x = 4,820,215,875.06
  5. Step 5: Solve for x
    x = 4,820,215,875.06/77,121.33
  6. Step 6: Final answer
    x = 62,501.72

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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.