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Finding the Fourth Proportional to 152,700.78, 210,727.13 and 85,632.78

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Solution

The fourth proportional to 152,700.78, 210,727.13 and 85,632.78 is: 118,173.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,700.78 : 210,727.13 = 85,632.78 : x
  2. Step 2: Convert to fraction form
    152,700.78/210,727.13 = 85,632.78/x
  3. Step 3: Cross multiply
    152,700.78x = 210,727.13 × 85,632.78
  4. Step 4: Simplify right side
    152,700.78x = 18,045,149,963.32
  5. Step 5: Solve for x
    x = 18,045,149,963.32/152,700.78
  6. Step 6: Final answer
    x = 118,173.27

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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.