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Finding the Fourth Proportional to 92,843.70, 139,265.55 and 86,938.80

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Solution

The fourth proportional to 92,843.70, 139,265.55 and 86,938.80 is: 130,408.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,843.70 : 139,265.55 = 86,938.80 : x
  2. Step 2: Convert to fraction form
    92,843.70/139,265.55 = 86,938.80/x
  3. Step 3: Cross multiply
    92,843.70x = 139,265.55 × 86,938.80
  4. Step 4: Simplify right side
    92,843.70x = 12,107,579,798.34
  5. Step 5: Solve for x
    x = 12,107,579,798.34/92,843.70
  6. Step 6: Final answer
    x = 130,408.20

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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.