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Finding the Fourth Proportional to 108,520.40, 162,788.70 and 38,390.60

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Solution

The fourth proportional to 108,520.40, 162,788.70 and 38,390.60 is: 57,588.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,520.40 : 162,788.70 = 38,390.60 : x
  2. Step 2: Convert to fraction form
    108,520.40/162,788.70 = 38,390.60/x
  3. Step 3: Cross multiply
    108,520.40x = 162,788.70 × 38,390.60
  4. Step 4: Simplify right side
    108,520.40x = 6,249,555,866.22
  5. Step 5: Solve for x
    x = 6,249,555,866.22/108,520.40
  6. Step 6: Final answer
    x = 57,588.77

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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.