Home / 121,557.05-167,547.96-81,256.11

Finding the Fourth Proportional to 121,557.05, 167,547.96 and 81,256.11

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Solution

The fourth proportional to 121,557.05, 167,547.96 and 81,256.11 is: 111,999.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,557.05 : 167,547.96 = 81,256.11 : x
  2. Step 2: Convert to fraction form
    121,557.05/167,547.96 = 81,256.11/x
  3. Step 3: Cross multiply
    121,557.05x = 167,547.96 × 81,256.11
  4. Step 4: Simplify right side
    121,557.05x = 13,614,295,782.19
  5. Step 5: Solve for x
    x = 13,614,295,782.19/121,557.05
  6. Step 6: Final answer
    x = 111,999.22

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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.