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Finding the Fourth Proportional to 86,692.60, 130,071.30 and 34,138.72

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Solution

The fourth proportional to 86,692.60, 130,071.30 and 34,138.72 is: 51,220.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,692.60 : 130,071.30 = 34,138.72 : x
  2. Step 2: Convert to fraction form
    86,692.60/130,071.30 = 34,138.72/x
  3. Step 3: Cross multiply
    86,692.60x = 130,071.30 × 34,138.72
  4. Step 4: Simplify right side
    86,692.60x = 4,440,467,690.74
  5. Step 5: Solve for x
    x = 4,440,467,690.74/86,692.60
  6. Step 6: Final answer
    x = 51,220.84

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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.