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Finding the Fourth Proportional to 70,178.81, 96,869.82 and 55,864.89

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Solution

The fourth proportional to 70,178.81, 96,869.82 and 55,864.89 is: 77,111.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,178.81 : 96,869.82 = 55,864.89 : x
  2. Step 2: Convert to fraction form
    70,178.81/96,869.82 = 55,864.89/x
  3. Step 3: Cross multiply
    70,178.81x = 96,869.82 × 55,864.89
  4. Step 4: Simplify right side
    70,178.81x = 5,411,622,048.11
  5. Step 5: Solve for x
    x = 5,411,622,048.11/70,178.81
  6. Step 6: Final answer
    x = 77,111.92

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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.