Home / 78,438.81-117,706.51-31,045.84

Finding the Fourth Proportional to 78,438.81, 117,706.51 and 31,045.84

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Solution

The fourth proportional to 78,438.81, 117,706.51 and 31,045.84 is: 46,587.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,438.81 : 117,706.51 = 31,045.84 : x
  2. Step 2: Convert to fraction form
    78,438.81/117,706.51 = 31,045.84/x
  3. Step 3: Cross multiply
    78,438.81x = 117,706.51 × 31,045.84
  4. Step 4: Simplify right side
    78,438.81x = 3,654,297,220.96
  5. Step 5: Solve for x
    x = 3,654,297,220.96/78,438.81
  6. Step 6: Final answer
    x = 46,587.87

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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.