Home / 123,629.12-170,482.56-105,783.20

Finding the Fourth Proportional to 123,629.12, 170,482.56 and 105,783.20

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Solution

The fourth proportional to 123,629.12, 170,482.56 and 105,783.20 is: 145,873.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,629.12 : 170,482.56 = 105,783.20 : x
  2. Step 2: Convert to fraction form
    123,629.12/170,482.56 = 105,783.20/x
  3. Step 3: Cross multiply
    123,629.12x = 170,482.56 × 105,783.20
  4. Step 4: Simplify right side
    123,629.12x = 18,034,190,740.99
  5. Step 5: Solve for x
    x = 18,034,190,740.99/123,629.12
  6. Step 6: Final answer
    x = 145,873.32

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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.