Home / 78,031.71-117,050.90-30,657.06

Finding the Fourth Proportional to 78,031.71, 117,050.90 and 30,657.06

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Solution

The fourth proportional to 78,031.71, 117,050.90 and 30,657.06 is: 45,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,031.71 : 117,050.90 = 30,657.06 : x
  2. Step 2: Convert to fraction form
    78,031.71/117,050.90 = 30,657.06/x
  3. Step 3: Cross multiply
    78,031.71x = 117,050.90 × 30,657.06
  4. Step 4: Simplify right side
    78,031.71x = 3,588,436,311.07
  5. Step 5: Solve for x
    x = 3,588,436,311.07/78,031.71
  6. Step 6: Final answer
    x = 45,986.90

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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.