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Finding the Fourth Proportional to 189,911.61, 284,779.59 and 69,938.27

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Solution

The fourth proportional to 189,911.61, 284,779.59 and 69,938.27 is: 104,875.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,911.61 : 284,779.59 = 69,938.27 : x
  2. Step 2: Convert to fraction form
    189,911.61/284,779.59 = 69,938.27/x
  3. Step 3: Cross multiply
    189,911.61x = 284,779.59 × 69,938.27
  4. Step 4: Simplify right side
    189,911.61x = 19,916,991,855.91
  5. Step 5: Solve for x
    x = 19,916,991,855.91/189,911.61
  6. Step 6: Final answer
    x = 104,875.06

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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.