Home / 105,558.12-145,670.40-57,811.44

Finding the Fourth Proportional to 105,558.12, 145,670.40 and 57,811.44

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Solution

The fourth proportional to 105,558.12, 145,670.40 and 57,811.44 is: 79,779.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,558.12 : 145,670.40 = 57,811.44 : x
  2. Step 2: Convert to fraction form
    105,558.12/145,670.40 = 57,811.44/x
  3. Step 3: Cross multiply
    105,558.12x = 145,670.40 × 57,811.44
  4. Step 4: Simplify right side
    105,558.12x = 8,421,415,589.38
  5. Step 5: Solve for x
    x = 8,421,415,589.38/105,558.12
  6. Step 6: Final answer
    x = 79,779.89

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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.