Home / 207,153.51-285,911.16-129,665.12

Finding the Fourth Proportional to 207,153.51, 285,911.16 and 129,665.12

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Solution

The fourth proportional to 207,153.51, 285,911.16 and 129,665.12 is: 178,962.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,153.51 : 285,911.16 = 129,665.12 : x
  2. Step 2: Convert to fraction form
    207,153.51/285,911.16 = 129,665.12/x
  3. Step 3: Cross multiply
    207,153.51x = 285,911.16 × 129,665.12
  4. Step 4: Simplify right side
    207,153.51x = 37,072,703,441.18
  5. Step 5: Solve for x
    x = 37,072,703,441.18/207,153.51
  6. Step 6: Final answer
    x = 178,962.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.