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Finding the Fourth Proportional to 121,888.80, 167,728.32 and 107,775.36

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Solution

The fourth proportional to 121,888.80, 167,728.32 and 107,775.36 is: 148,307.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,888.80 : 167,728.32 = 107,775.36 : x
  2. Step 2: Convert to fraction form
    121,888.80/167,728.32 = 107,775.36/x
  3. Step 3: Cross multiply
    121,888.80x = 167,728.32 × 107,775.36
  4. Step 4: Simplify right side
    121,888.80x = 18,076,980,070.20
  5. Step 5: Solve for x
    x = 18,076,980,070.20/121,888.80
  6. Step 6: Final answer
    x = 148,307.15

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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.