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Finding the Fourth Proportional to 86,576.40, 129,840.30 and 27,430.20

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Solution

The fourth proportional to 86,576.40, 129,840.30 and 27,430.20 is: 41,137.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,576.40 : 129,840.30 = 27,430.20 : x
  2. Step 2: Convert to fraction form
    86,576.40/129,840.30 = 27,430.20/x
  3. Step 3: Cross multiply
    86,576.40x = 129,840.30 × 27,430.20
  4. Step 4: Simplify right side
    86,576.40x = 3,561,545,397.06
  5. Step 5: Solve for x
    x = 3,561,545,397.06/86,576.40
  6. Step 6: Final answer
    x = 41,137.60

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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.