Home / 139,883.12-193,038.78-76,220.92

Finding the Fourth Proportional to 139,883.12, 193,038.78 and 76,220.92

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Solution

The fourth proportional to 139,883.12, 193,038.78 and 76,220.92 is: 105,184.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,883.12 : 193,038.78 = 76,220.92 : x
  2. Step 2: Convert to fraction form
    139,883.12/193,038.78 = 76,220.92/x
  3. Step 3: Cross multiply
    139,883.12x = 193,038.78 × 76,220.92
  4. Step 4: Simplify right side
    139,883.12x = 14,713,593,407.28
  5. Step 5: Solve for x
    x = 14,713,593,407.28/139,883.12
  6. Step 6: Final answer
    x = 105,184.91

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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.