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Finding the Fourth Proportional to 125,878.95, 173,707.82 and 72,126.58

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Solution

The fourth proportional to 125,878.95, 173,707.82 and 72,126.58 is: 99,531.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,878.95 : 173,707.82 = 72,126.58 : x
  2. Step 2: Convert to fraction form
    125,878.95/173,707.82 = 72,126.58/x
  3. Step 3: Cross multiply
    125,878.95x = 173,707.82 × 72,126.58
  4. Step 4: Simplify right side
    125,878.95x = 12,528,950,975.86
  5. Step 5: Solve for x
    x = 12,528,950,975.86/125,878.95
  6. Step 6: Final answer
    x = 99,531.74

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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.