Home / 128,848.54-177,810.64-72,261.13

Finding the Fourth Proportional to 128,848.54, 177,810.64 and 72,261.13

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Solution

The fourth proportional to 128,848.54, 177,810.64 and 72,261.13 is: 99,720.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,848.54 : 177,810.64 = 72,261.13 : x
  2. Step 2: Convert to fraction form
    128,848.54/177,810.64 = 72,261.13/x
  3. Step 3: Cross multiply
    128,848.54x = 177,810.64 × 72,261.13
  4. Step 4: Simplify right side
    128,848.54x = 12,848,797,772.42
  5. Step 5: Solve for x
    x = 12,848,797,772.42/128,848.54
  6. Step 6: Final answer
    x = 99,720.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.