Home / 89,211.46-122,802.79-77,106.42

Finding the Fourth Proportional to 89,211.46, 122,802.79 and 77,106.42

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Solution

The fourth proportional to 89,211.46, 122,802.79 and 77,106.42 is: 106,139.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,211.46 : 122,802.79 = 77,106.42 : x
  2. Step 2: Convert to fraction form
    89,211.46/122,802.79 = 77,106.42/x
  3. Step 3: Cross multiply
    89,211.46x = 122,802.79 × 77,106.42
  4. Step 4: Simplify right side
    89,211.46x = 9,468,883,502.91
  5. Step 5: Solve for x
    x = 9,468,883,502.91/89,211.46
  6. Step 6: Final answer
    x = 106,139.77

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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.