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Finding the Fourth Proportional to 45,987.66, 68,970.48 and 12,706.98

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Solution

The fourth proportional to 45,987.66, 68,970.48 and 12,706.98 is: 19,057.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,987.66 : 68,970.48 = 12,706.98 : x
  2. Step 2: Convert to fraction form
    45,987.66/68,970.48 = 12,706.98/x
  3. Step 3: Cross multiply
    45,987.66x = 68,970.48 × 12,706.98
  4. Step 4: Simplify right side
    45,987.66x = 876,406,509.95
  5. Step 5: Solve for x
    x = 876,406,509.95/45,987.66
  6. Step 6: Final answer
    x = 19,057.43

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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.