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Finding the Fourth Proportional to 143,673.60, 198,215.04 and 87,064.32

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Solution

The fourth proportional to 143,673.60, 198,215.04 and 87,064.32 is: 120,115.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,673.60 : 198,215.04 = 87,064.32 : x
  2. Step 2: Convert to fraction form
    143,673.60/198,215.04 = 87,064.32/x
  3. Step 3: Cross multiply
    143,673.60x = 198,215.04 × 87,064.32
  4. Step 4: Simplify right side
    143,673.60x = 17,257,457,671.37
  5. Step 5: Solve for x
    x = 17,257,457,671.37/143,673.60
  6. Step 6: Final answer
    x = 120,115.72

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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.