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Finding the Fourth Proportional to 191,139.60, 286,675.80 and 72,818.04

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Solution

The fourth proportional to 191,139.60, 286,675.80 and 72,818.04 is: 109,214.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,139.60 : 286,675.80 = 72,818.04 : x
  2. Step 2: Convert to fraction form
    191,139.60/286,675.80 = 72,818.04/x
  3. Step 3: Cross multiply
    191,139.60x = 286,675.80 × 72,818.04
  4. Step 4: Simplify right side
    191,139.60x = 20,875,169,871.43
  5. Step 5: Solve for x
    x = 20,875,169,871.43/191,139.60
  6. Step 6: Final answer
    x = 109,214.26

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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.