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Finding the Fourth Proportional to 113,450.40, 170,240.40 and 78,415.20

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Solution

The fourth proportional to 113,450.40, 170,240.40 and 78,415.20 is: 117,667.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,450.40 : 170,240.40 = 78,415.20 : x
  2. Step 2: Convert to fraction form
    113,450.40/170,240.40 = 78,415.20/x
  3. Step 3: Cross multiply
    113,450.40x = 170,240.40 × 78,415.20
  4. Step 4: Simplify right side
    113,450.40x = 13,349,435,014.08
  5. Step 5: Solve for x
    x = 13,349,435,014.08/113,450.40
  6. Step 6: Final answer
    x = 117,667.59

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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.