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Finding the Fourth Proportional to 113,587.90, 156,751.94 and 65,869.58

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Solution

The fourth proportional to 113,587.90, 156,751.94 and 65,869.58 is: 90,900.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,587.90 : 156,751.94 = 65,869.58 : x
  2. Step 2: Convert to fraction form
    113,587.90/156,751.94 = 65,869.58/x
  3. Step 3: Cross multiply
    113,587.90x = 156,751.94 × 65,869.58
  4. Step 4: Simplify right side
    113,587.90x = 10,325,184,451.99
  5. Step 5: Solve for x
    x = 10,325,184,451.99/113,587.90
  6. Step 6: Final answer
    x = 90,900.39

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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.