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Finding the Fourth Proportional to 63,406.60, 87,421.70 and 40,705.56

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Solution

The fourth proportional to 63,406.60, 87,421.70 and 40,705.56 is: 56,122.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,406.60 : 87,421.70 = 40,705.56 : x
  2. Step 2: Convert to fraction form
    63,406.60/87,421.70 = 40,705.56/x
  3. Step 3: Cross multiply
    63,406.60x = 87,421.70 × 40,705.56
  4. Step 4: Simplify right side
    63,406.60x = 3,558,549,254.65
  5. Step 5: Solve for x
    x = 3,558,549,254.65/63,406.60
  6. Step 6: Final answer
    x = 56,122.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.