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Finding the Fourth Proportional to 93,718.20, 129,334.16 and 53,431.20

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Solution

The fourth proportional to 93,718.20, 129,334.16 and 53,431.20 is: 73,736.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,718.20 : 129,334.16 = 53,431.20 : x
  2. Step 2: Convert to fraction form
    93,718.20/129,334.16 = 53,431.20/x
  3. Step 3: Cross multiply
    93,718.20x = 129,334.16 × 53,431.20
  4. Step 4: Simplify right side
    93,718.20x = 6,910,479,369.79
  5. Step 5: Solve for x
    x = 6,910,479,369.79/93,718.20
  6. Step 6: Final answer
    x = 73,736.79

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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.