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Finding the Fourth Proportional to 108,420.60, 162,630.90 and 76,927.80

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Solution

The fourth proportional to 108,420.60, 162,630.90 and 76,927.80 is: 115,391.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,420.60 : 162,630.90 = 76,927.80 : x
  2. Step 2: Convert to fraction form
    108,420.60/162,630.90 = 76,927.80/x
  3. Step 3: Cross multiply
    108,420.60x = 162,630.90 × 76,927.80
  4. Step 4: Simplify right side
    108,420.60x = 12,510,837,349.02
  5. Step 5: Solve for x
    x = 12,510,837,349.02/108,420.60
  6. Step 6: Final answer
    x = 115,391.70

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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.