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Finding the Fourth Proportional to 81,178.94, 112,030.40 and 45,368.95

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Solution

The fourth proportional to 81,178.94, 112,030.40 and 45,368.95 is: 62,611.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,178.94 : 112,030.40 = 45,368.95 : x
  2. Step 2: Convert to fraction form
    81,178.94/112,030.40 = 45,368.95/x
  3. Step 3: Cross multiply
    81,178.94x = 112,030.40 × 45,368.95
  4. Step 4: Simplify right side
    81,178.94x = 5,082,701,616.08
  5. Step 5: Solve for x
    x = 5,082,701,616.08/81,178.94
  6. Step 6: Final answer
    x = 62,611.09

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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.