Home / 139,801.07-192,925.70-76,139.12

Finding the Fourth Proportional to 139,801.07, 192,925.70 and 76,139.12

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Solution

The fourth proportional to 139,801.07, 192,925.70 and 76,139.12 is: 105,072.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,801.07 : 192,925.70 = 76,139.12 : x
  2. Step 2: Convert to fraction form
    139,801.07/192,925.70 = 76,139.12/x
  3. Step 3: Cross multiply
    139,801.07x = 192,925.70 × 76,139.12
  4. Step 4: Simplify right side
    139,801.07x = 14,689,193,410.52
  5. Step 5: Solve for x
    x = 14,689,193,410.52/139,801.07
  6. Step 6: Final answer
    x = 105,072.11

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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.