Home / 103,990.22-143,507.16-56,243.45

Finding the Fourth Proportional to 103,990.22, 143,507.16 and 56,243.45

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Solution

The fourth proportional to 103,990.22, 143,507.16 and 56,243.45 is: 77,616.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,990.22 : 143,507.16 = 56,243.45 : x
  2. Step 2: Convert to fraction form
    103,990.22/143,507.16 = 56,243.45/x
  3. Step 3: Cross multiply
    103,990.22x = 143,507.16 × 56,243.45
  4. Step 4: Simplify right side
    103,990.22x = 8,071,337,778.10
  5. Step 5: Solve for x
    x = 8,071,337,778.10/103,990.22
  6. Step 6: Final answer
    x = 77,616.32

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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.