Home / 56,138.76-77,470.02-30,987.72

Finding the Fourth Proportional to 56,138.76, 77,470.02 and 30,987.72

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Solution

The fourth proportional to 56,138.76, 77,470.02 and 30,987.72 is: 42,762.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,138.76 : 77,470.02 = 30,987.72 : x
  2. Step 2: Convert to fraction form
    56,138.76/77,470.02 = 30,987.72/x
  3. Step 3: Cross multiply
    56,138.76x = 77,470.02 × 30,987.72
  4. Step 4: Simplify right side
    56,138.76x = 2,400,619,288.15
  5. Step 5: Solve for x
    x = 2,400,619,288.15/56,138.76
  6. Step 6: Final answer
    x = 42,762.24

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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.