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Finding the Fourth Proportional to 92,911.40, 139,431.90 and 59,712.20

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Solution

The fourth proportional to 92,911.40, 139,431.90 and 59,712.20 is: 89,609.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,911.40 : 139,431.90 = 59,712.20 : x
  2. Step 2: Convert to fraction form
    92,911.40/139,431.90 = 59,712.20/x
  3. Step 3: Cross multiply
    92,911.40x = 139,431.90 × 59,712.20
  4. Step 4: Simplify right side
    92,911.40x = 8,325,785,499.18
  5. Step 5: Solve for x
    x = 8,325,785,499.18/92,911.40
  6. Step 6: Final answer
    x = 89,609.95

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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.