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Finding the Fourth Proportional to 108,210.60, 162,315.90 and 70,885.80

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Solution

The fourth proportional to 108,210.60, 162,315.90 and 70,885.80 is: 106,328.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,210.60 : 162,315.90 = 70,885.80 : x
  2. Step 2: Convert to fraction form
    108,210.60/162,315.90 = 70,885.80/x
  3. Step 3: Cross multiply
    108,210.60x = 162,315.90 × 70,885.80
  4. Step 4: Simplify right side
    108,210.60x = 11,505,892,424.22
  5. Step 5: Solve for x
    x = 11,505,892,424.22/108,210.60
  6. Step 6: Final answer
    x = 106,328.70

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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.