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Finding the Fourth Proportional to 245,661.71, 368,497.11 and 77,178.87

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Solution

The fourth proportional to 245,661.71, 368,497.11 and 77,178.87 is: 115,769.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,661.71 : 368,497.11 = 77,178.87 : x
  2. Step 2: Convert to fraction form
    245,661.71/368,497.11 = 77,178.87/x
  3. Step 3: Cross multiply
    245,661.71x = 368,497.11 × 77,178.87
  4. Step 4: Simplify right side
    245,661.71x = 28,440,190,548.07
  5. Step 5: Solve for x
    x = 28,440,190,548.07/245,661.71
  6. Step 6: Final answer
    x = 115,769.74

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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.