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Finding the Fourth Proportional to 43,171.80, 64,854.90 and 42,005.40

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Solution

The fourth proportional to 43,171.80, 64,854.90 and 42,005.40 is: 63,102.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,171.80 : 64,854.90 = 42,005.40 : x
  2. Step 2: Convert to fraction form
    43,171.80/64,854.90 = 42,005.40/x
  3. Step 3: Cross multiply
    43,171.80x = 64,854.90 × 42,005.40
  4. Step 4: Simplify right side
    43,171.80x = 2,724,256,016.46
  5. Step 5: Solve for x
    x = 2,724,256,016.46/43,171.80
  6. Step 6: Final answer
    x = 63,102.67

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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.