Home / 78,524.34-117,786.51-31,810.02

Finding the Fourth Proportional to 78,524.34, 117,786.51 and 31,810.02

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Solution

The fourth proportional to 78,524.34, 117,786.51 and 31,810.02 is: 47,715.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,524.34 : 117,786.51 = 31,810.02 : x
  2. Step 2: Convert to fraction form
    78,524.34/117,786.51 = 31,810.02/x
  3. Step 3: Cross multiply
    78,524.34x = 117,786.51 × 31,810.02
  4. Step 4: Simplify right side
    78,524.34x = 3,746,791,238.83
  5. Step 5: Solve for x
    x = 3,746,791,238.83/78,524.34
  6. Step 6: Final answer
    x = 47,715.03

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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.