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Finding the Fourth Proportional to 108,285.70, 162,428.55 and 103,620.10

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Solution

The fourth proportional to 108,285.70, 162,428.55 and 103,620.10 is: 155,430.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,285.70 : 162,428.55 = 103,620.10 : x
  2. Step 2: Convert to fraction form
    108,285.70/162,428.55 = 103,620.10/x
  3. Step 3: Cross multiply
    108,285.70x = 162,428.55 × 103,620.10
  4. Step 4: Simplify right side
    108,285.70x = 16,830,862,593.86
  5. Step 5: Solve for x
    x = 16,830,862,593.86/108,285.70
  6. Step 6: Final answer
    x = 155,430.15

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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.