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Finding the Fourth Proportional to 138,323.52, 190,836 and 84,582.72

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Solution

The fourth proportional to 138,323.52, 190,836 and 84,582.72 is: 116,693.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,323.52 : 190,836 = 84,582.72 : x
  2. Step 2: Convert to fraction form
    138,323.52/190,836 = 84,582.72/x
  3. Step 3: Cross multiply
    138,323.52x = 190,836 × 84,582.72
  4. Step 4: Simplify right side
    138,323.52x = 16,141,427,953.92
  5. Step 5: Solve for x
    x = 16,141,427,953.92/138,323.52
  6. Step 6: Final answer
    x = 116,693.30

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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.