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Finding the Fourth Proportional to 128,573.30, 192,887.50 and 65,402.22

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Solution

The fourth proportional to 128,573.30, 192,887.50 and 65,402.22 is: 98,117.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,573.30 : 192,887.50 = 65,402.22 : x
  2. Step 2: Convert to fraction form
    128,573.30/192,887.50 = 65,402.22/x
  3. Step 3: Cross multiply
    128,573.30x = 192,887.50 × 65,402.22
  4. Step 4: Simplify right side
    128,573.30x = 12,615,270,710.25
  5. Step 5: Solve for x
    x = 12,615,270,710.25/128,573.30
  6. Step 6: Final answer
    x = 98,117.34

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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.