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Finding the Fourth Proportional to 56,555.88, 78,044 and 31,065.59

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Solution

The fourth proportional to 56,555.88, 78,044 and 31,065.59 is: 42,868.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,555.88 : 78,044 = 31,065.59 : x
  2. Step 2: Convert to fraction form
    56,555.88/78,044 = 31,065.59/x
  3. Step 3: Cross multiply
    56,555.88x = 78,044 × 31,065.59
  4. Step 4: Simplify right side
    56,555.88x = 2,424,482,905.96
  5. Step 5: Solve for x
    x = 2,424,482,905.96/56,555.88
  6. Step 6: Final answer
    x = 42,868.80

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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.