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Finding the Fourth Proportional to 92,645.80, 139,314.30 and 77,439.40

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Solution

The fourth proportional to 92,645.80, 139,314.30 and 77,439.40 is: 116,447.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,645.80 : 139,314.30 = 77,439.40 : x
  2. Step 2: Convert to fraction form
    92,645.80/139,314.30 = 77,439.40/x
  3. Step 3: Cross multiply
    92,645.80x = 139,314.30 × 77,439.40
  4. Step 4: Simplify right side
    92,645.80x = 10,788,415,803.42
  5. Step 5: Solve for x
    x = 10,788,415,803.42/92,645.80
  6. Step 6: Final answer
    x = 116,447.98

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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.