Home / 56,720.99-78,261.58-47,680.72

Finding the Fourth Proportional to 56,720.99, 78,261.58 and 47,680.72

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Solution

The fourth proportional to 56,720.99, 78,261.58 and 47,680.72 is: 65,788.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,720.99 : 78,261.58 = 47,680.72 : x
  2. Step 2: Convert to fraction form
    56,720.99/78,261.58 = 47,680.72/x
  3. Step 3: Cross multiply
    56,720.99x = 78,261.58 × 47,680.72
  4. Step 4: Simplify right side
    56,720.99x = 3,731,568,482.74
  5. Step 5: Solve for x
    x = 3,731,568,482.74/56,720.99
  6. Step 6: Final answer
    x = 65,788.14

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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.