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Finding the Fourth Proportional to 85,993.65, 128,916.97 and 32,655.76

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Solution

The fourth proportional to 85,993.65, 128,916.97 and 32,655.76 is: 48,955.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,993.65 : 128,916.97 = 32,655.76 : x
  2. Step 2: Convert to fraction form
    85,993.65/128,916.97 = 32,655.76/x
  3. Step 3: Cross multiply
    85,993.65x = 128,916.97 × 32,655.76
  4. Step 4: Simplify right side
    85,993.65x = 4,209,881,228.32
  5. Step 5: Solve for x
    x = 4,209,881,228.32/85,993.65
  6. Step 6: Final answer
    x = 48,955.72

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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.