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Finding the Fourth Proportional to 92,742.45, 139,808.72 and 86,562.96

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Solution

The fourth proportional to 92,742.45, 139,808.72 and 86,562.96 is: 130,493.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,742.45 : 139,808.72 = 86,562.96 : x
  2. Step 2: Convert to fraction form
    92,742.45/139,808.72 = 86,562.96/x
  3. Step 3: Cross multiply
    92,742.45x = 139,808.72 × 86,562.96
  4. Step 4: Simplify right side
    92,742.45x = 12,102,256,204.20
  5. Step 5: Solve for x
    x = 12,102,256,204.20/92,742.45
  6. Step 6: Final answer
    x = 130,493.17

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.