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Finding the Fourth Proportional to 63,712.64, 87,920 and 35,416.32

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Solution

The fourth proportional to 63,712.64, 87,920 and 35,416.32 is: 48,872.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,712.64 : 87,920 = 35,416.32 : x
  2. Step 2: Convert to fraction form
    63,712.64/87,920 = 35,416.32/x
  3. Step 3: Cross multiply
    63,712.64x = 87,920 × 35,416.32
  4. Step 4: Simplify right side
    63,712.64x = 3,113,802,854.40
  5. Step 5: Solve for x
    x = 3,113,802,854.40/63,712.64
  6. Step 6: Final answer
    x = 48,872.61

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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.