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Finding the Fourth Proportional to 92,714.40, 139,363.20 and 90,964.80

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Solution

The fourth proportional to 92,714.40, 139,363.20 and 90,964.80 is: 136,733.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,714.40 : 139,363.20 = 90,964.80 : x
  2. Step 2: Convert to fraction form
    92,714.40/139,363.20 = 90,964.80/x
  3. Step 3: Cross multiply
    92,714.40x = 139,363.20 × 90,964.80
  4. Step 4: Simplify right side
    92,714.40x = 12,677,145,615.36
  5. Step 5: Solve for x
    x = 12,677,145,615.36/92,714.40
  6. Step 6: Final answer
    x = 136,733.30

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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.