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Finding the Fourth Proportional to 191,861.30, 288,051.15 and 121,877.30

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Solution

The fourth proportional to 191,861.30, 288,051.15 and 121,877.30 is: 182,980.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,861.30 : 288,051.15 = 121,877.30 : x
  2. Step 2: Convert to fraction form
    191,861.30/288,051.15 = 121,877.30/x
  3. Step 3: Cross multiply
    191,861.30x = 288,051.15 × 121,877.30
  4. Step 4: Simplify right side
    191,861.30x = 35,106,896,423.90
  5. Step 5: Solve for x
    x = 35,106,896,423.90/191,861.30
  6. Step 6: Final answer
    x = 182,980.60

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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.