Home / 56,619.86-78,136.40-31,127.30

Finding the Fourth Proportional to 56,619.86, 78,136.40 and 31,127.30

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Solution

The fourth proportional to 56,619.86, 78,136.40 and 31,127.30 is: 42,956.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,619.86 : 78,136.40 = 31,127.30 : x
  2. Step 2: Convert to fraction form
    56,619.86/78,136.40 = 31,127.30/x
  3. Step 3: Cross multiply
    56,619.86x = 78,136.40 × 31,127.30
  4. Step 4: Simplify right side
    56,619.86x = 2,432,174,617.40
  5. Step 5: Solve for x
    x = 2,432,174,617.40/56,619.86
  6. Step 6: Final answer
    x = 42,956.21

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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.