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Finding the Fourth Proportional to 158,880.80, 219,256.80 and 87,261.68

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Solution

The fourth proportional to 158,880.80, 219,256.80 and 87,261.68 is: 120,421.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,880.80 : 219,256.80 = 87,261.68 : x
  2. Step 2: Convert to fraction form
    158,880.80/219,256.80 = 87,261.68/x
  3. Step 3: Cross multiply
    158,880.80x = 219,256.80 × 87,261.68
  4. Step 4: Simplify right side
    158,880.80x = 19,132,716,719.42
  5. Step 5: Solve for x
    x = 19,132,716,719.42/158,880.80
  6. Step 6: Final answer
    x = 120,421.83

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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.