Home / 128,881.02-177,451.65-117,071.22

Finding the Fourth Proportional to 128,881.02, 177,451.65 and 117,071.22

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Solution

The fourth proportional to 128,881.02, 177,451.65 and 117,071.22 is: 161,191.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,881.02 : 177,451.65 = 117,071.22 : x
  2. Step 2: Convert to fraction form
    128,881.02/177,451.65 = 117,071.22/x
  3. Step 3: Cross multiply
    128,881.02x = 177,451.65 × 117,071.22
  4. Step 4: Simplify right side
    128,881.02x = 20,774,481,156.51
  5. Step 5: Solve for x
    x = 20,774,481,156.51/128,881.02
  6. Step 6: Final answer
    x = 161,191.16

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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.