Home / 257,973.68-386,973.99-78,054.55

Finding the Fourth Proportional to 257,973.68, 386,973.99 and 78,054.55

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Solution

The fourth proportional to 257,973.68, 386,973.99 and 78,054.55 is: 117,085.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,973.68 : 386,973.99 = 78,054.55 : x
  2. Step 2: Convert to fraction form
    257,973.68/386,973.99 = 78,054.55/x
  3. Step 3: Cross multiply
    257,973.68x = 386,973.99 × 78,054.55
  4. Step 4: Simplify right side
    257,973.68x = 30,205,079,683.72
  5. Step 5: Solve for x
    x = 30,205,079,683.72/257,973.68
  6. Step 6: Final answer
    x = 117,085.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.