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Finding the Fourth Proportional to 68,746.20, 103,119.30 and 65,117.40

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Solution

The fourth proportional to 68,746.20, 103,119.30 and 65,117.40 is: 97,676.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,746.20 : 103,119.30 = 65,117.40 : x
  2. Step 2: Convert to fraction form
    68,746.20/103,119.30 = 65,117.40/x
  3. Step 3: Cross multiply
    68,746.20x = 103,119.30 × 65,117.40
  4. Step 4: Simplify right side
    68,746.20x = 6,714,860,705.82
  5. Step 5: Solve for x
    x = 6,714,860,705.82/68,746.20
  6. Step 6: Final answer
    x = 97,676.10

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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.