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Finding the Fourth Proportional to 109,689.60, 151,620.48 and 100,980.48

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Solution

The fourth proportional to 109,689.60, 151,620.48 and 100,980.48 is: 139,582.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,689.60 : 151,620.48 = 100,980.48 : x
  2. Step 2: Convert to fraction form
    109,689.60/151,620.48 = 100,980.48/x
  3. Step 3: Cross multiply
    109,689.60x = 151,620.48 × 100,980.48
  4. Step 4: Simplify right side
    109,689.60x = 15,310,708,848.23
  5. Step 5: Solve for x
    x = 15,310,708,848.23/109,689.60
  6. Step 6: Final answer
    x = 139,582.14

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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.