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Finding the Fourth Proportional to 56,373.90, 77,796.93 and 30,879.90

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Solution

The fourth proportional to 56,373.90, 77,796.93 and 30,879.90 is: 42,614.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,373.90 : 77,796.93 = 30,879.90 : x
  2. Step 2: Convert to fraction form
    56,373.90/77,796.93 = 30,879.90/x
  3. Step 3: Cross multiply
    56,373.90x = 77,796.93 × 30,879.90
  4. Step 4: Simplify right side
    56,373.90x = 2,402,361,418.71
  5. Step 5: Solve for x
    x = 2,402,361,418.71/56,373.90
  6. Step 6: Final answer
    x = 42,614.78

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1.5x scale

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.