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Finding the Fourth Proportional to 56,679.88, 78,218.69 and 31,529.38

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Solution

The fourth proportional to 56,679.88, 78,218.69 and 31,529.38 is: 43,510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,679.88 : 78,218.69 = 31,529.38 : x
  2. Step 2: Convert to fraction form
    56,679.88/78,218.69 = 31,529.38/x
  3. Step 3: Cross multiply
    56,679.88x = 78,218.69 × 31,529.38
  4. Step 4: Simplify right side
    56,679.88x = 2,466,186,800.11
  5. Step 5: Solve for x
    x = 2,466,186,800.11/56,679.88
  6. Step 6: Final answer
    x = 43,510.80

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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.