Home / 56,931.40-78,563.70-31,780.36

Finding the Fourth Proportional to 56,931.40, 78,563.70 and 31,780.36

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Solution

The fourth proportional to 56,931.40, 78,563.70 and 31,780.36 is: 43,855.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,931.40 : 78,563.70 = 31,780.36 : x
  2. Step 2: Convert to fraction form
    56,931.40/78,563.70 = 31,780.36/x
  3. Step 3: Cross multiply
    56,931.40x = 78,563.70 × 31,780.36
  4. Step 4: Simplify right side
    56,931.40x = 2,496,782,668.93
  5. Step 5: Solve for x
    x = 2,496,782,668.93/56,931.40
  6. Step 6: Final answer
    x = 43,855.99

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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.