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Finding the Fourth Proportional to 128,259.64, 192,410.52 and 39,511.20

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Solution

The fourth proportional to 128,259.64, 192,410.52 and 39,511.20 is: 59,273.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,259.64 : 192,410.52 = 39,511.20 : x
  2. Step 2: Convert to fraction form
    128,259.64/192,410.52 = 39,511.20/x
  3. Step 3: Cross multiply
    128,259.64x = 192,410.52 × 39,511.20
  4. Step 4: Simplify right side
    128,259.64x = 7,602,370,537.82
  5. Step 5: Solve for x
    x = 7,602,370,537.82/128,259.64
  6. Step 6: Final answer
    x = 59,273.29

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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.