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Finding the Fourth Proportional to 158,403.44, 218,417.64 and 100,966.16

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Solution

The fourth proportional to 158,403.44, 218,417.64 and 100,966.16 is: 139,219.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,403.44 : 218,417.64 = 100,966.16 : x
  2. Step 2: Convert to fraction form
    158,403.44/218,417.64 = 100,966.16/x
  3. Step 3: Cross multiply
    158,403.44x = 218,417.64 × 100,966.16
  4. Step 4: Simplify right side
    158,403.44x = 22,052,790,387.06
  5. Step 5: Solve for x
    x = 22,052,790,387.06/158,403.44
  6. Step 6: Final answer
    x = 139,219.14

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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.