Home / 113,907.08-157,161.78-78,108.20

Finding the Fourth Proportional to 113,907.08, 157,161.78 and 78,108.20

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Solution

The fourth proportional to 113,907.08, 157,161.78 and 78,108.20 is: 107,768.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,907.08 : 157,161.78 = 78,108.20 : x
  2. Step 2: Convert to fraction form
    113,907.08/157,161.78 = 78,108.20/x
  3. Step 3: Cross multiply
    113,907.08x = 157,161.78 × 78,108.20
  4. Step 4: Simplify right side
    113,907.08x = 12,275,623,744.60
  5. Step 5: Solve for x
    x = 12,275,623,744.60/113,907.08
  6. Step 6: Final answer
    x = 107,768.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.