Home / 103,230.02-142,408.32-65,438.66

Finding the Fourth Proportional to 103,230.02, 142,408.32 and 65,438.66

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Solution

The fourth proportional to 103,230.02, 142,408.32 and 65,438.66 is: 90,274.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,230.02 : 142,408.32 = 65,438.66 : x
  2. Step 2: Convert to fraction form
    103,230.02/142,408.32 = 65,438.66/x
  3. Step 3: Cross multiply
    103,230.02x = 142,408.32 × 65,438.66
  4. Step 4: Simplify right side
    103,230.02x = 9,319,009,633.65
  5. Step 5: Solve for x
    x = 9,319,009,633.65/103,230.02
  6. Step 6: Final answer
    x = 90,274.22

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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.