Home / 128,070.67-176,880.26-99,731.25

Finding the Fourth Proportional to 128,070.67, 176,880.26 and 99,731.25

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Solution

The fourth proportional to 128,070.67, 176,880.26 and 99,731.25 is: 137,740.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,070.67 : 176,880.26 = 99,731.25 : x
  2. Step 2: Convert to fraction form
    128,070.67/176,880.26 = 99,731.25/x
  3. Step 3: Cross multiply
    128,070.67x = 176,880.26 × 99,731.25
  4. Step 4: Simplify right side
    128,070.67x = 17,640,489,118.46
  5. Step 5: Solve for x
    x = 17,640,489,118.46/128,070.67
  6. Step 6: Final answer
    x = 137,740.27

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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.