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Finding the Fourth Proportional to 218,878.10, 328,326.99 and 67,064.06

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Solution

The fourth proportional to 218,878.10, 328,326.99 and 67,064.06 is: 100,599.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,878.10 : 328,326.99 = 67,064.06 : x
  2. Step 2: Convert to fraction form
    218,878.10/328,326.99 = 67,064.06/x
  3. Step 3: Cross multiply
    218,878.10x = 328,326.99 × 67,064.06
  4. Step 4: Simplify right side
    218,878.10x = 22,018,939,968.50
  5. Step 5: Solve for x
    x = 22,018,939,968.50/218,878.10
  6. Step 6: Final answer
    x = 100,599.10

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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.