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Finding the Fourth Proportional to 42,998.49, 64,486.80 and 16,688.88

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Solution

The fourth proportional to 42,998.49, 64,486.80 and 16,688.88 is: 25,029.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,998.49 : 64,486.80 = 16,688.88 : x
  2. Step 2: Convert to fraction form
    42,998.49/64,486.80 = 16,688.88/x
  3. Step 3: Cross multiply
    42,998.49x = 64,486.80 × 16,688.88
  4. Step 4: Simplify right side
    42,998.49x = 1,076,212,466.78
  5. Step 5: Solve for x
    x = 1,076,212,466.78/42,998.49
  6. Step 6: Final answer
    x = 25,029.08

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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.