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Finding the Fourth Proportional to 191,319.98, 286,984.69 and 91,490.72

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Solution

The fourth proportional to 191,319.98, 286,984.69 and 91,490.72 is: 137,238.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,319.98 : 286,984.69 = 91,490.72 : x
  2. Step 2: Convert to fraction form
    191,319.98/286,984.69 = 91,490.72/x
  3. Step 3: Cross multiply
    191,319.98x = 286,984.69 × 91,490.72
  4. Step 4: Simplify right side
    191,319.98x = 26,256,434,253.43
  5. Step 5: Solve for x
    x = 26,256,434,253.43/191,319.98
  6. Step 6: Final answer
    x = 137,238.33

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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.