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Finding the Fourth Proportional to 139,030.07, 191,854.04 and 78,597.11

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Solution

The fourth proportional to 139,030.07, 191,854.04 and 78,597.11 is: 108,459.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,030.07 : 191,854.04 = 78,597.11 : x
  2. Step 2: Convert to fraction form
    139,030.07/191,854.04 = 78,597.11/x
  3. Step 3: Cross multiply
    139,030.07x = 191,854.04 × 78,597.11
  4. Step 4: Simplify right side
    139,030.07x = 15,079,172,692.84
  5. Step 5: Solve for x
    x = 15,079,172,692.84/139,030.07
  6. Step 6: Final answer
    x = 108,459.79

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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.