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Finding the Fourth Proportional to 70,025.78, 96,643.74 and 39,815.63

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Solution

The fourth proportional to 70,025.78, 96,643.74 and 39,815.63 is: 54,950.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,025.78 : 96,643.74 = 39,815.63 : x
  2. Step 2: Convert to fraction form
    70,025.78/96,643.74 = 39,815.63/x
  3. Step 3: Cross multiply
    70,025.78x = 96,643.74 × 39,815.63
  4. Step 4: Simplify right side
    70,025.78x = 3,847,931,393.66
  5. Step 5: Solve for x
    x = 3,847,931,393.66/70,025.78
  6. Step 6: Final answer
    x = 54,950.21

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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.