Home / 128,681.61-177,587.15-74,213.51

Finding the Fourth Proportional to 128,681.61, 177,587.15 and 74,213.51

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Solution

The fourth proportional to 128,681.61, 177,587.15 and 74,213.51 is: 102,418.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,681.61 : 177,587.15 = 74,213.51 : x
  2. Step 2: Convert to fraction form
    128,681.61/177,587.15 = 74,213.51/x
  3. Step 3: Cross multiply
    128,681.61x = 177,587.15 × 74,213.51
  4. Step 4: Simplify right side
    128,681.61x = 13,179,365,805.30
  5. Step 5: Solve for x
    x = 13,179,365,805.30/128,681.61
  6. Step 6: Final answer
    x = 102,418.41

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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.