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Finding the Fourth Proportional to 86,466.80, 129,700.20 and 54,018.20

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Solution

The fourth proportional to 86,466.80, 129,700.20 and 54,018.20 is: 81,027.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,466.80 : 129,700.20 = 54,018.20 : x
  2. Step 2: Convert to fraction form
    86,466.80/129,700.20 = 54,018.20/x
  3. Step 3: Cross multiply
    86,466.80x = 129,700.20 × 54,018.20
  4. Step 4: Simplify right side
    86,466.80x = 7,006,171,343.64
  5. Step 5: Solve for x
    x = 7,006,171,343.64/86,466.80
  6. Step 6: Final answer
    x = 81,027.30

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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.