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Finding the Fourth Proportional to 105,639.40, 158,459.10 and 43,354.60

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Solution

The fourth proportional to 105,639.40, 158,459.10 and 43,354.60 is: 65,031.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,639.40 : 158,459.10 = 43,354.60 : x
  2. Step 2: Convert to fraction form
    105,639.40/158,459.10 = 43,354.60/x
  3. Step 3: Cross multiply
    105,639.40x = 158,459.10 × 43,354.60
  4. Step 4: Simplify right side
    105,639.40x = 6,869,930,896.86
  5. Step 5: Solve for x
    x = 6,869,930,896.86/105,639.40
  6. Step 6: Final answer
    x = 65,031.90

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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.