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Finding the Fourth Proportional to 128,482.47, 192,723.71 and 39,736.74

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Solution

The fourth proportional to 128,482.47, 192,723.71 and 39,736.74 is: 59,605.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,482.47 : 192,723.71 = 39,736.74 : x
  2. Step 2: Convert to fraction form
    128,482.47/192,723.71 = 39,736.74/x
  3. Step 3: Cross multiply
    128,482.47x = 192,723.71 × 39,736.74
  4. Step 4: Simplify right side
    128,482.47x = 7,658,212,480.14
  5. Step 5: Solve for x
    x = 7,658,212,480.14/128,482.47
  6. Step 6: Final answer
    x = 59,605.12

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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.