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Finding the Fourth Proportional to 191,336.42, 286,754.13 and 78,885.74

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Solution

The fourth proportional to 191,336.42, 286,754.13 and 78,885.74 is: 118,225.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,336.42 : 286,754.13 = 78,885.74 : x
  2. Step 2: Convert to fraction form
    191,336.42/286,754.13 = 78,885.74/x
  3. Step 3: Cross multiply
    191,336.42x = 286,754.13 × 78,885.74
  4. Step 4: Simplify right side
    191,336.42x = 22,620,811,743.11
  5. Step 5: Solve for x
    x = 22,620,811,743.11/191,336.42
  6. Step 6: Final answer
    x = 118,225.33

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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.