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Finding the Fourth Proportional to 128,479.77, 192,743.15 and 39,727.26

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Solution

The fourth proportional to 128,479.77, 192,743.15 and 39,727.26 is: 59,598.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,479.77 : 192,743.15 = 39,727.26 : x
  2. Step 2: Convert to fraction form
    128,479.77/192,743.15 = 39,727.26/x
  3. Step 3: Cross multiply
    128,479.77x = 192,743.15 × 39,727.26
  4. Step 4: Simplify right side
    128,479.77x = 7,657,157,034.63
  5. Step 5: Solve for x
    x = 7,657,157,034.63/128,479.77
  6. Step 6: Final answer
    x = 59,598.15

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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.