Home / 78,726.42-118,135.35-33,130.74

Finding the Fourth Proportional to 78,726.42, 118,135.35 and 33,130.74

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Solution

The fourth proportional to 78,726.42, 118,135.35 and 33,130.74 is: 49,715.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,726.42 : 118,135.35 = 33,130.74 : x
  2. Step 2: Convert to fraction form
    78,726.42/118,135.35 = 33,130.74/x
  3. Step 3: Cross multiply
    78,726.42x = 118,135.35 × 33,130.74
  4. Step 4: Simplify right side
    78,726.42x = 3,913,911,565.66
  5. Step 5: Solve for x
    x = 3,913,911,565.66/78,726.42
  6. Step 6: Final answer
    x = 49,715.35

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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.