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Finding the Fourth Proportional to 191,406.60, 287,171.10 and 58,312.20

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Solution

The fourth proportional to 191,406.60, 287,171.10 and 58,312.20 is: 87,486.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,406.60 : 287,171.10 = 58,312.20 : x
  2. Step 2: Convert to fraction form
    191,406.60/287,171.10 = 58,312.20/x
  3. Step 3: Cross multiply
    191,406.60x = 287,171.10 × 58,312.20
  4. Step 4: Simplify right side
    191,406.60x = 16,745,578,617.42
  5. Step 5: Solve for x
    x = 16,745,578,617.42/191,406.60
  6. Step 6: Final answer
    x = 87,486.94

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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.