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Finding the Fourth Proportional to 128,574.65, 192,892.77 and 53,653.12

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Solution

The fourth proportional to 128,574.65, 192,892.77 and 53,653.12 is: 80,492.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,574.65 : 192,892.77 = 53,653.12 : x
  2. Step 2: Convert to fraction form
    128,574.65/192,892.77 = 53,653.12/x
  3. Step 3: Cross multiply
    128,574.65x = 192,892.77 × 53,653.12
  4. Step 4: Simplify right side
    128,574.65x = 10,349,298,935.94
  5. Step 5: Solve for x
    x = 10,349,298,935.94/128,574.65
  6. Step 6: Final answer
    x = 80,492.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.