Home / 85,986.72-129,017.20-46,572

Finding the Fourth Proportional to 85,986.72, 129,017.20 and 46,572

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Solution

The fourth proportional to 85,986.72, 129,017.20 and 46,572 is: 69,878.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,986.72 : 129,017.20 = 46,572 : x
  2. Step 2: Convert to fraction form
    85,986.72/129,017.20 = 46,572/x
  3. Step 3: Cross multiply
    85,986.72x = 129,017.20 × 46,572
  4. Step 4: Simplify right side
    85,986.72x = 6,008,589,038.40
  5. Step 5: Solve for x
    x = 6,008,589,038.40/85,986.72
  6. Step 6: Final answer
    x = 69,878.10

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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.