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Finding the Fourth Proportional to 92,649.60, 138,826.08 and 90,189.18

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Solution

The fourth proportional to 92,649.60, 138,826.08 and 90,189.18 is: 135,139.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,649.60 : 138,826.08 = 90,189.18 : x
  2. Step 2: Convert to fraction form
    92,649.60/138,826.08 = 90,189.18/x
  3. Step 3: Cross multiply
    92,649.60x = 138,826.08 × 90,189.18
  4. Step 4: Simplify right side
    92,649.60x = 12,520,610,317.81
  5. Step 5: Solve for x
    x = 12,520,610,317.81/92,649.60
  6. Step 6: Final answer
    x = 135,139.39

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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.