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Finding the Fourth Proportional to 68,454.60, 102,746.70 and 42,210.60

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Solution

The fourth proportional to 68,454.60, 102,746.70 and 42,210.60 is: 63,355.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,454.60 : 102,746.70 = 42,210.60 : x
  2. Step 2: Convert to fraction form
    68,454.60/102,746.70 = 42,210.60/x
  3. Step 3: Cross multiply
    68,454.60x = 102,746.70 × 42,210.60
  4. Step 4: Simplify right side
    68,454.60x = 4,336,999,855.02
  5. Step 5: Solve for x
    x = 4,336,999,855.02/68,454.60
  6. Step 6: Final answer
    x = 63,355.86

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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.