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Finding the Fourth Proportional to 128,005.80, 192,030.99 and 43,774.39

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Solution

The fourth proportional to 128,005.80, 192,030.99 and 43,774.39 is: 65,669.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,005.80 : 192,030.99 = 43,774.39 : x
  2. Step 2: Convert to fraction form
    128,005.80/192,030.99 = 43,774.39/x
  3. Step 3: Cross multiply
    128,005.80x = 192,030.99 × 43,774.39
  4. Step 4: Simplify right side
    128,005.80x = 8,406,039,448.35
  5. Step 5: Solve for x
    x = 8,406,039,448.35/128,005.80
  6. Step 6: Final answer
    x = 65,669.21

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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.