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Finding the Fourth Proportional to 191,004.56, 286,509.72 and 72,619.28

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Solution

The fourth proportional to 191,004.56, 286,509.72 and 72,619.28 is: 108,930.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,004.56 : 286,509.72 = 72,619.28 : x
  2. Step 2: Convert to fraction form
    191,004.56/286,509.72 = 72,619.28/x
  3. Step 3: Cross multiply
    191,004.56x = 286,509.72 × 72,619.28
  4. Step 4: Simplify right side
    191,004.56x = 20,806,129,579.40
  5. Step 5: Solve for x
    x = 20,806,129,579.40/191,004.56
  6. Step 6: Final answer
    x = 108,930.01

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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.