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Finding the Fourth Proportional to 77,615.64, 107,083.80 and 47,390.04

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Solution

The fourth proportional to 77,615.64, 107,083.80 and 47,390.04 is: 65,382.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,615.64 : 107,083.80 = 47,390.04 : x
  2. Step 2: Convert to fraction form
    77,615.64/107,083.80 = 47,390.04/x
  3. Step 3: Cross multiply
    77,615.64x = 107,083.80 × 47,390.04
  4. Step 4: Simplify right side
    77,615.64x = 5,074,705,565.35
  5. Step 5: Solve for x
    x = 5,074,705,565.35/77,615.64
  6. Step 6: Final answer
    x = 65,382.51

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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.