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Finding the Fourth Proportional to 87,661.40, 131,492.10 and 61,417.40

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Solution

The fourth proportional to 87,661.40, 131,492.10 and 61,417.40 is: 92,126.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,661.40 : 131,492.10 = 61,417.40 : x
  2. Step 2: Convert to fraction form
    87,661.40/131,492.10 = 61,417.40/x
  3. Step 3: Cross multiply
    87,661.40x = 131,492.10 × 61,417.40
  4. Step 4: Simplify right side
    87,661.40x = 8,075,902,902.54
  5. Step 5: Solve for x
    x = 8,075,902,902.54/87,661.40
  6. Step 6: Final answer
    x = 92,126.10

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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.