Home / 56,811.94-78,400.47-31,318.74

Finding the Fourth Proportional to 56,811.94, 78,400.47 and 31,318.74

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Solution

The fourth proportional to 56,811.94, 78,400.47 and 31,318.74 is: 43,219.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,811.94 : 78,400.47 = 31,318.74 : x
  2. Step 2: Convert to fraction form
    56,811.94/78,400.47 = 31,318.74/x
  3. Step 3: Cross multiply
    56,811.94x = 78,400.47 × 31,318.74
  4. Step 4: Simplify right side
    56,811.94x = 2,455,403,935.81
  5. Step 5: Solve for x
    x = 2,455,403,935.81/56,811.94
  6. Step 6: Final answer
    x = 43,219.86

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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.