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Finding the Fourth Proportional to 152,411.91, 210,331.81 and 86,999.40

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Solution

The fourth proportional to 152,411.91, 210,331.81 and 86,999.40 is: 120,061.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,411.91 : 210,331.81 = 86,999.40 : x
  2. Step 2: Convert to fraction form
    152,411.91/210,331.81 = 86,999.40/x
  3. Step 3: Cross multiply
    152,411.91x = 210,331.81 × 86,999.40
  4. Step 4: Simplify right side
    152,411.91x = 18,298,741,270.91
  5. Step 5: Solve for x
    x = 18,298,741,270.91/152,411.91
  6. Step 6: Final answer
    x = 120,061.10

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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.