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Finding the Fourth Proportional to 134,756.50, 186,036.87 and 81,053.50

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Solution

The fourth proportional to 134,756.50, 186,036.87 and 81,053.50 is: 111,897.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,756.50 : 186,036.87 = 81,053.50 : x
  2. Step 2: Convert to fraction form
    134,756.50/186,036.87 = 81,053.50/x
  3. Step 3: Cross multiply
    134,756.50x = 186,036.87 × 81,053.50
  4. Step 4: Simplify right side
    134,756.50x = 15,078,939,442.55
  5. Step 5: Solve for x
    x = 15,078,939,442.55/134,756.50
  6. Step 6: Final answer
    x = 111,897.68

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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.