Home / 105,567.84-145,678.20-57,811.96

Finding the Fourth Proportional to 105,567.84, 145,678.20 and 57,811.96

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Solution

The fourth proportional to 105,567.84, 145,678.20 and 57,811.96 is: 79,777.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,567.84 : 145,678.20 = 57,811.96 : x
  2. Step 2: Convert to fraction form
    105,567.84/145,678.20 = 57,811.96/x
  3. Step 3: Cross multiply
    105,567.84x = 145,678.20 × 57,811.96
  4. Step 4: Simplify right side
    105,567.84x = 8,421,942,271.27
  5. Step 5: Solve for x
    x = 8,421,942,271.27/105,567.84
  6. Step 6: Final answer
    x = 79,777.54

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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.