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Finding the Fourth Proportional to 68,018.74, 102,045.40 and 39,962.50

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Solution

The fourth proportional to 68,018.74, 102,045.40 and 39,962.50 is: 59,953.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,018.74 : 102,045.40 = 39,962.50 : x
  2. Step 2: Convert to fraction form
    68,018.74/102,045.40 = 39,962.50/x
  3. Step 3: Cross multiply
    68,018.74x = 102,045.40 × 39,962.50
  4. Step 4: Simplify right side
    68,018.74x = 4,077,988,942.48
  5. Step 5: Solve for x
    x = 4,077,988,942.48/68,018.74
  6. Step 6: Final answer
    x = 59,953.91

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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.