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Finding the Fourth Proportional to 128,547.87, 192,790.33 and 53,668.63

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Solution

The fourth proportional to 128,547.87, 192,790.33 and 53,668.63 is: 80,489.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,547.87 : 192,790.33 = 53,668.63 : x
  2. Step 2: Convert to fraction form
    128,547.87/192,790.33 = 53,668.63/x
  3. Step 3: Cross multiply
    128,547.87x = 192,790.33 × 53,668.63
  4. Step 4: Simplify right side
    128,547.87x = 10,346,792,888.35
  5. Step 5: Solve for x
    x = 10,346,792,888.35/128,547.87
  6. Step 6: Final answer
    x = 80,489.81

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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.