Home / 128,316.89-177,077.31-71,728.26

Finding the Fourth Proportional to 128,316.89, 177,077.31 and 71,728.26

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Solution

The fourth proportional to 128,316.89, 177,077.31 and 71,728.26 is: 98,985.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,316.89 : 177,077.31 = 71,728.26 : x
  2. Step 2: Convert to fraction form
    128,316.89/177,077.31 = 71,728.26/x
  3. Step 3: Cross multiply
    128,316.89x = 177,077.31 × 71,728.26
  4. Step 4: Simplify right side
    128,316.89x = 12,701,447,331.78
  5. Step 5: Solve for x
    x = 12,701,447,331.78/128,316.89
  6. Step 6: Final answer
    x = 98,985.00

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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.