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Finding the Fourth Proportional to 113,235.40, 169,853.10 and 87,072.20

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Solution

The fourth proportional to 113,235.40, 169,853.10 and 87,072.20 is: 130,608.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,235.40 : 169,853.10 = 87,072.20 : x
  2. Step 2: Convert to fraction form
    113,235.40/169,853.10 = 87,072.20/x
  3. Step 3: Cross multiply
    113,235.40x = 169,853.10 × 87,072.20
  4. Step 4: Simplify right side
    113,235.40x = 14,789,483,093.82
  5. Step 5: Solve for x
    x = 14,789,483,093.82/113,235.40
  6. Step 6: Final answer
    x = 130,608.30

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1.5x scale

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.