Home / 128,858.04-177,823.71-72,270.63

Finding the Fourth Proportional to 128,858.04, 177,823.71 and 72,270.63

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Solution

The fourth proportional to 128,858.04, 177,823.71 and 72,270.63 is: 99,733.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,858.04 : 177,823.71 = 72,270.63 : x
  2. Step 2: Convert to fraction form
    128,858.04/177,823.71 = 72,270.63/x
  3. Step 3: Cross multiply
    128,858.04x = 177,823.71 × 72,270.63
  4. Step 4: Simplify right side
    128,858.04x = 12,851,431,550.64
  5. Step 5: Solve for x
    x = 12,851,431,550.64/128,858.04
  6. Step 6: Final answer
    x = 99,733.25

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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.