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Finding the Fourth Proportional to 128,315.16, 192,192.24 and 65,026.64

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Solution

The fourth proportional to 128,315.16, 192,192.24 and 65,026.64 is: 97,397.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,315.16 : 192,192.24 = 65,026.64 : x
  2. Step 2: Convert to fraction form
    128,315.16/192,192.24 = 65,026.64/x
  3. Step 3: Cross multiply
    128,315.16x = 192,192.24 × 65,026.64
  4. Step 4: Simplify right side
    128,315.16x = 12,497,615,601.27
  5. Step 5: Solve for x
    x = 12,497,615,601.27/128,315.16
  6. Step 6: Final answer
    x = 97,397.81

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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.