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Finding the Fourth Proportional to 128,053.36, 192,130.44 and 64,838.80

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Solution

The fourth proportional to 128,053.36, 192,130.44 and 64,838.80 is: 97,283.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,053.36 : 192,130.44 = 64,838.80 : x
  2. Step 2: Convert to fraction form
    128,053.36/192,130.44 = 64,838.80/x
  3. Step 3: Cross multiply
    128,053.36x = 192,130.44 × 64,838.80
  4. Step 4: Simplify right side
    128,053.36x = 12,457,507,173.07
  5. Step 5: Solve for x
    x = 12,457,507,173.07/128,053.36
  6. Step 6: Final answer
    x = 97,283.72

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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.