Home / 78,322.49-117,325.73-36,143.98

Finding the Fourth Proportional to 78,322.49, 117,325.73 and 36,143.98

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Solution

The fourth proportional to 78,322.49, 117,325.73 and 36,143.98 is: 54,143.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,322.49 : 117,325.73 = 36,143.98 : x
  2. Step 2: Convert to fraction form
    78,322.49/117,325.73 = 36,143.98/x
  3. Step 3: Cross multiply
    78,322.49x = 117,325.73 × 36,143.98
  4. Step 4: Simplify right side
    78,322.49x = 4,240,618,838.61
  5. Step 5: Solve for x
    x = 4,240,618,838.61/78,322.49
  6. Step 6: Final answer
    x = 54,143.05

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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.