Home / 56,128.19-84,372.72-45,156.74

Finding the Fourth Proportional to 56,128.19, 84,372.72 and 45,156.74

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Solution

The fourth proportional to 56,128.19, 84,372.72 and 45,156.74 is: 67,880.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,128.19 : 84,372.72 = 45,156.74 : x
  2. Step 2: Convert to fraction form
    56,128.19/84,372.72 = 45,156.74/x
  3. Step 3: Cross multiply
    56,128.19x = 84,372.72 × 45,156.74
  4. Step 4: Simplify right side
    56,128.19x = 3,809,996,980.13
  5. Step 5: Solve for x
    x = 3,809,996,980.13/56,128.19
  6. Step 6: Final answer
    x = 67,880.28

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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.