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Finding the Fourth Proportional to 56,656.70, 85,017.45 and 39,139.10

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Solution

The fourth proportional to 56,656.70, 85,017.45 and 39,139.10 is: 58,731.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,656.70 : 85,017.45 = 39,139.10 : x
  2. Step 2: Convert to fraction form
    56,656.70/85,017.45 = 39,139.10/x
  3. Step 3: Cross multiply
    56,656.70x = 85,017.45 × 39,139.10
  4. Step 4: Simplify right side
    56,656.70x = 3,327,506,477.30
  5. Step 5: Solve for x
    x = 3,327,506,477.30/56,656.70
  6. Step 6: Final answer
    x = 58,731.03

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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.