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Finding the Fourth Proportional to 56,859.80, 78,465.55 and 31,368.61

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Solution

The fourth proportional to 56,859.80, 78,465.55 and 31,368.61 is: 43,288.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,859.80 : 78,465.55 = 31,368.61 : x
  2. Step 2: Convert to fraction form
    56,859.80/78,465.55 = 31,368.61/x
  3. Step 3: Cross multiply
    56,859.80x = 78,465.55 × 31,368.61
  4. Step 4: Simplify right side
    56,859.80x = 2,461,355,236.39
  5. Step 5: Solve for x
    x = 2,461,355,236.39/56,859.80
  6. Step 6: Final answer
    x = 43,288.14

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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.