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Finding the Fourth Proportional to 110,431.71, 152,356.95 and 72,213.63

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Solution

The fourth proportional to 110,431.71, 152,356.95 and 72,213.63 is: 99,629.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,431.71 : 152,356.95 = 72,213.63 : x
  2. Step 2: Convert to fraction form
    110,431.71/152,356.95 = 72,213.63/x
  3. Step 3: Cross multiply
    110,431.71x = 152,356.95 × 72,213.63
  4. Step 4: Simplify right side
    110,431.71x = 11,002,248,415.23
  5. Step 5: Solve for x
    x = 11,002,248,415.23/110,431.71
  6. Step 6: Final answer
    x = 99,629.43

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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.