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Finding the Fourth Proportional to 128,592.30, 192,916.02 and 65,421.24

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Solution

The fourth proportional to 128,592.30, 192,916.02 and 65,421.24 is: 98,145.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,592.30 : 192,916.02 = 65,421.24 : x
  2. Step 2: Convert to fraction form
    128,592.30/192,916.02 = 65,421.24/x
  3. Step 3: Cross multiply
    128,592.30x = 192,916.02 × 65,421.24
  4. Step 4: Simplify right side
    128,592.30x = 12,620,805,244.26
  5. Step 5: Solve for x
    x = 12,620,805,244.26/128,592.30
  6. Step 6: Final answer
    x = 98,145.89

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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.