Home / 85,614.38-128,247.48-69,875.50

Finding the Fourth Proportional to 85,614.38, 128,247.48 and 69,875.50

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Solution

The fourth proportional to 85,614.38, 128,247.48 and 69,875.50 is: 104,671.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,614.38 : 128,247.48 = 69,875.50 : x
  2. Step 2: Convert to fraction form
    85,614.38/128,247.48 = 69,875.50/x
  3. Step 3: Cross multiply
    85,614.38x = 128,247.48 × 69,875.50
  4. Step 4: Simplify right side
    85,614.38x = 8,961,356,788.74
  5. Step 5: Solve for x
    x = 8,961,356,788.74/85,614.38
  6. Step 6: Final answer
    x = 104,671.16

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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.