Home / 78,153.15-117,229.38-18,988.98

Finding the Fourth Proportional to 78,153.15, 117,229.38 and 18,988.98

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Solution

The fourth proportional to 78,153.15, 117,229.38 and 18,988.98 is: 28,483.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,153.15 : 117,229.38 = 18,988.98 : x
  2. Step 2: Convert to fraction form
    78,153.15/117,229.38 = 18,988.98/x
  3. Step 3: Cross multiply
    78,153.15x = 117,229.38 × 18,988.98
  4. Step 4: Simplify right side
    78,153.15x = 2,226,066,500.83
  5. Step 5: Solve for x
    x = 2,226,066,500.83/78,153.15
  6. Step 6: Final answer
    x = 28,483.39

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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.