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Finding the Fourth Proportional to 128,902.10, 193,353.15 and 69,853.10

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Solution

The fourth proportional to 128,902.10, 193,353.15 and 69,853.10 is: 104,779.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,902.10 : 193,353.15 = 69,853.10 : x
  2. Step 2: Convert to fraction form
    128,902.10/193,353.15 = 69,853.10/x
  3. Step 3: Cross multiply
    128,902.10x = 193,353.15 × 69,853.10
  4. Step 4: Simplify right side
    128,902.10x = 13,506,316,922.27
  5. Step 5: Solve for x
    x = 13,506,316,922.27/128,902.10
  6. Step 6: Final answer
    x = 104,779.65

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1.5x scale

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.