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Finding the Fourth Proportional to 86,738.70, 130,010.85 and 36,810.30

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Solution

The fourth proportional to 86,738.70, 130,010.85 and 36,810.30 is: 55,174.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,738.70 : 130,010.85 = 36,810.30 : x
  2. Step 2: Convert to fraction form
    86,738.70/130,010.85 = 36,810.30/x
  3. Step 3: Cross multiply
    86,738.70x = 130,010.85 × 36,810.30
  4. Step 4: Simplify right side
    86,738.70x = 4,785,738,391.76
  5. Step 5: Solve for x
    x = 4,785,738,391.76/86,738.70
  6. Step 6: Final answer
    x = 55,174.20

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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.