Home / 123,900.12-170,985.66-70,185.12

Finding the Fourth Proportional to 123,900.12, 170,985.66 and 70,185.12

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Solution

The fourth proportional to 123,900.12, 170,985.66 and 70,185.12 is: 96,857.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,900.12 : 170,985.66 = 70,185.12 : x
  2. Step 2: Convert to fraction form
    123,900.12/170,985.66 = 70,185.12/x
  3. Step 3: Cross multiply
    123,900.12x = 170,985.66 × 70,185.12
  4. Step 4: Simplify right side
    123,900.12x = 12,000,649,065.38
  5. Step 5: Solve for x
    x = 12,000,649,065.38/123,900.12
  6. Step 6: Final answer
    x = 96,857.45

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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.