Home / 85,355.72-117,703.50-56,665.28

Finding the Fourth Proportional to 85,355.72, 117,703.50 and 56,665.28

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Solution

The fourth proportional to 85,355.72, 117,703.50 and 56,665.28 is: 78,140.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,355.72 : 117,703.50 = 56,665.28 : x
  2. Step 2: Convert to fraction form
    85,355.72/117,703.50 = 56,665.28/x
  3. Step 3: Cross multiply
    85,355.72x = 117,703.50 × 56,665.28
  4. Step 4: Simplify right side
    85,355.72x = 6,669,701,784.48
  5. Step 5: Solve for x
    x = 6,669,701,784.48/85,355.72
  6. Step 6: Final answer
    x = 78,140.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.