Home / 89,071.20-133,347.60-78,703.20

Finding the Fourth Proportional to 89,071.20, 133,347.60 and 78,703.20

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Solution

The fourth proportional to 89,071.20, 133,347.60 and 78,703.20 is: 117,825.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,071.20 : 133,347.60 = 78,703.20 : x
  2. Step 2: Convert to fraction form
    89,071.20/133,347.60 = 78,703.20/x
  3. Step 3: Cross multiply
    89,071.20x = 133,347.60 × 78,703.20
  4. Step 4: Simplify right side
    89,071.20x = 10,494,882,832.32
  5. Step 5: Solve for x
    x = 10,494,882,832.32/89,071.20
  6. Step 6: Final answer
    x = 117,825.77

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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.