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Finding the Fourth Proportional to 191,071.20, 286,533.90 and 57,907.20

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Solution

The fourth proportional to 191,071.20, 286,533.90 and 57,907.20 is: 86,838.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,071.20 : 286,533.90 = 57,907.20 : x
  2. Step 2: Convert to fraction form
    191,071.20/286,533.90 = 57,907.20/x
  3. Step 3: Cross multiply
    191,071.20x = 286,533.90 × 57,907.20
  4. Step 4: Simplify right side
    191,071.20x = 16,592,375,854.08
  5. Step 5: Solve for x
    x = 16,592,375,854.08/191,071.20
  6. Step 6: Final answer
    x = 86,838.71

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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.