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Finding the Fourth Proportional to 68,365.20, 102,547.80 and 45,037.20

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Solution

The fourth proportional to 68,365.20, 102,547.80 and 45,037.20 is: 67,555.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,365.20 : 102,547.80 = 45,037.20 : x
  2. Step 2: Convert to fraction form
    68,365.20/102,547.80 = 45,037.20/x
  3. Step 3: Cross multiply
    68,365.20x = 102,547.80 × 45,037.20
  4. Step 4: Simplify right side
    68,365.20x = 4,618,465,778.16
  5. Step 5: Solve for x
    x = 4,618,465,778.16/68,365.20
  6. Step 6: Final answer
    x = 67,555.80

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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.