Home / 56,931.84-78,566.40-31,780.80

Finding the Fourth Proportional to 56,931.84, 78,566.40 and 31,780.80

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Solution

The fourth proportional to 56,931.84, 78,566.40 and 31,780.80 is: 43,857.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,931.84 : 78,566.40 = 31,780.80 : x
  2. Step 2: Convert to fraction form
    56,931.84/78,566.40 = 31,780.80/x
  3. Step 3: Cross multiply
    56,931.84x = 78,566.40 × 31,780.80
  4. Step 4: Simplify right side
    56,931.84x = 2,496,903,045.12
  5. Step 5: Solve for x
    x = 2,496,903,045.12/56,931.84
  6. Step 6: Final answer
    x = 43,857.76

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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.