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Finding the Fourth Proportional to 158,612.42, 218,885.28 and 86,993.84

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Solution

The fourth proportional to 158,612.42, 218,885.28 and 86,993.84 is: 120,051.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,612.42 : 218,885.28 = 86,993.84 : x
  2. Step 2: Convert to fraction form
    158,612.42/218,885.28 = 86,993.84/x
  3. Step 3: Cross multiply
    158,612.42x = 218,885.28 × 86,993.84
  4. Step 4: Simplify right side
    158,612.42x = 19,041,671,026.68
  5. Step 5: Solve for x
    x = 19,041,671,026.68/158,612.42
  6. Step 6: Final answer
    x = 120,051.58

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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.