Home / 128,848.08-177,810.05-71,496.12

Finding the Fourth Proportional to 128,848.08, 177,810.05 and 71,496.12

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Solution

The fourth proportional to 128,848.08, 177,810.05 and 71,496.12 is: 98,664.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,848.08 : 177,810.05 = 71,496.12 : x
  2. Step 2: Convert to fraction form
    128,848.08/177,810.05 = 71,496.12/x
  3. Step 3: Cross multiply
    128,848.08x = 177,810.05 × 71,496.12
  4. Step 4: Simplify right side
    128,848.08x = 12,712,728,672.01
  5. Step 5: Solve for x
    x = 12,712,728,672.01/128,848.08
  6. Step 6: Final answer
    x = 98,664.48

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Double scale
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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.