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Finding the Fourth Proportional to 92,905.40, 139,358.10 and 86,684.60

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Solution

The fourth proportional to 92,905.40, 139,358.10 and 86,684.60 is: 130,026.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,905.40 : 139,358.10 = 86,684.60 : x
  2. Step 2: Convert to fraction form
    92,905.40/139,358.10 = 86,684.60/x
  3. Step 3: Cross multiply
    92,905.40x = 139,358.10 × 86,684.60
  4. Step 4: Simplify right side
    92,905.40x = 12,080,201,155.26
  5. Step 5: Solve for x
    x = 12,080,201,155.26/92,905.40
  6. Step 6: Final answer
    x = 130,026.90

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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.