Home / 78,306.56-117,464.16-31,554.08

Finding the Fourth Proportional to 78,306.56, 117,464.16 and 31,554.08

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Solution

The fourth proportional to 78,306.56, 117,464.16 and 31,554.08 is: 47,332.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,306.56 : 117,464.16 = 31,554.08 : x
  2. Step 2: Convert to fraction form
    78,306.56/117,464.16 = 31,554.08/x
  3. Step 3: Cross multiply
    78,306.56x = 117,464.16 × 31,554.08
  4. Step 4: Simplify right side
    78,306.56x = 3,706,473,501.77
  5. Step 5: Solve for x
    x = 3,706,473,501.77/78,306.56
  6. Step 6: Final answer
    x = 47,332.86

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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.