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Finding the Fourth Proportional to 70,595.96, 105,870.45 and 28,465.16

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Solution

The fourth proportional to 70,595.96, 105,870.45 and 28,465.16 is: 42,688.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,595.96 : 105,870.45 = 28,465.16 : x
  2. Step 2: Convert to fraction form
    70,595.96/105,870.45 = 28,465.16/x
  3. Step 3: Cross multiply
    70,595.96x = 105,870.45 × 28,465.16
  4. Step 4: Simplify right side
    70,595.96x = 3,013,618,891.52
  5. Step 5: Solve for x
    x = 3,013,618,891.52/70,595.96
  6. Step 6: Final answer
    x = 42,688.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.