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Finding the Fourth Proportional to 137,322.40, 205,983.60 and 58,439.20

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Solution

The fourth proportional to 137,322.40, 205,983.60 and 58,439.20 is: 87,658.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,322.40 : 205,983.60 = 58,439.20 : x
  2. Step 2: Convert to fraction form
    137,322.40/205,983.60 = 58,439.20/x
  3. Step 3: Cross multiply
    137,322.40x = 205,983.60 × 58,439.20
  4. Step 4: Simplify right side
    137,322.40x = 12,037,516,797.12
  5. Step 5: Solve for x
    x = 12,037,516,797.12/137,322.40
  6. Step 6: Final answer
    x = 87,658.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.