Home / 78,087.19-117,152.67-31,372.87

Finding the Fourth Proportional to 78,087.19, 117,152.67 and 31,372.87

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Solution

The fourth proportional to 78,087.19, 117,152.67 and 31,372.87 is: 47,068.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,087.19 : 117,152.67 = 31,372.87 : x
  2. Step 2: Convert to fraction form
    78,087.19/117,152.67 = 31,372.87/x
  3. Step 3: Cross multiply
    78,087.19x = 117,152.67 × 31,372.87
  4. Step 4: Simplify right side
    78,087.19x = 3,675,415,486.06
  5. Step 5: Solve for x
    x = 3,675,415,486.06/78,087.19
  6. Step 6: Final answer
    x = 47,068.10

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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.