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Finding the Fourth Proportional to 191,136.39, 286,739.15 and 78,754.08

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Solution

The fourth proportional to 191,136.39, 286,739.15 and 78,754.08 is: 118,145.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,136.39 : 286,739.15 = 78,754.08 : x
  2. Step 2: Convert to fraction form
    191,136.39/286,739.15 = 78,754.08/x
  3. Step 3: Cross multiply
    191,136.39x = 286,739.15 × 78,754.08
  4. Step 4: Simplify right side
    191,136.39x = 22,581,878,639.73
  5. Step 5: Solve for x
    x = 22,581,878,639.73/191,136.39
  6. Step 6: Final answer
    x = 118,145.37

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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.