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Finding the Fourth Proportional to 128,950.56, 177,954.96 and 72,366.24

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Solution

The fourth proportional to 128,950.56, 177,954.96 and 72,366.24 is: 99,867.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,950.56 : 177,954.96 = 72,366.24 : x
  2. Step 2: Convert to fraction form
    128,950.56/177,954.96 = 72,366.24/x
  3. Step 3: Cross multiply
    128,950.56x = 177,954.96 × 72,366.24
  4. Step 4: Simplify right side
    128,950.56x = 12,877,931,344.55
  5. Step 5: Solve for x
    x = 12,877,931,344.55/128,950.56
  6. Step 6: Final answer
    x = 99,867.20

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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.