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Finding the Fourth Proportional to 86,813.70, 130,123.35 and 36,885.30

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Solution

The fourth proportional to 86,813.70, 130,123.35 and 36,885.30 is: 55,286.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,813.70 : 130,123.35 = 36,885.30 : x
  2. Step 2: Convert to fraction form
    86,813.70/130,123.35 = 36,885.30/x
  3. Step 3: Cross multiply
    86,813.70x = 130,123.35 × 36,885.30
  4. Step 4: Simplify right side
    86,813.70x = 4,799,638,801.76
  5. Step 5: Solve for x
    x = 4,799,638,801.76/86,813.70
  6. Step 6: Final answer
    x = 55,286.65

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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.