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Finding the Fourth Proportional to 109,717.77, 151,409.72 and 61,980.45

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Solution

The fourth proportional to 109,717.77, 151,409.72 and 61,980.45 is: 85,532.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,717.77 : 151,409.72 = 61,980.45 : x
  2. Step 2: Convert to fraction form
    109,717.77/151,409.72 = 61,980.45/x
  3. Step 3: Cross multiply
    109,717.77x = 151,409.72 × 61,980.45
  4. Step 4: Simplify right side
    109,717.77x = 9,384,442,270.07
  5. Step 5: Solve for x
    x = 9,384,442,270.07/109,717.77
  6. Step 6: Final answer
    x = 85,532.56

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1.5x scale

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.