Home / 139,281.06-192,218.04-78,032.64

Finding the Fourth Proportional to 139,281.06, 192,218.04 and 78,032.64

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Solution

The fourth proportional to 139,281.06, 192,218.04 and 78,032.64 is: 107,690.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,281.06 : 192,218.04 = 78,032.64 : x
  2. Step 2: Convert to fraction form
    139,281.06/192,218.04 = 78,032.64/x
  3. Step 3: Cross multiply
    139,281.06x = 192,218.04 × 78,032.64
  4. Step 4: Simplify right side
    139,281.06x = 14,999,281,116.83
  5. Step 5: Solve for x
    x = 14,999,281,116.83/139,281.06
  6. Step 6: Final answer
    x = 107,690.75

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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.