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Finding the Fourth Proportional to 68,397.74, 94,390.48 and 42,905.19

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Solution

The fourth proportional to 68,397.74, 94,390.48 and 42,905.19 is: 59,210.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,397.74 : 94,390.48 = 42,905.19 : x
  2. Step 2: Convert to fraction form
    68,397.74/94,390.48 = 42,905.19/x
  3. Step 3: Cross multiply
    68,397.74x = 94,390.48 × 42,905.19
  4. Step 4: Simplify right side
    68,397.74x = 4,049,841,478.59
  5. Step 5: Solve for x
    x = 4,049,841,478.59/68,397.74
  6. Step 6: Final answer
    x = 59,210.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.