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Finding the Fourth Proportional to 86,675.70, 129,916.35 and 36,747.30

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Solution

The fourth proportional to 86,675.70, 129,916.35 and 36,747.30 is: 55,079.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,675.70 : 129,916.35 = 36,747.30 : x
  2. Step 2: Convert to fraction form
    86,675.70/129,916.35 = 36,747.30/x
  3. Step 3: Cross multiply
    86,675.70x = 129,916.35 × 36,747.30
  4. Step 4: Simplify right side
    86,675.70x = 4,774,075,088.36
  5. Step 5: Solve for x
    x = 4,774,075,088.36/86,675.70
  6. Step 6: Final answer
    x = 55,079.74

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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.