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Finding the Fourth Proportional to 78,585.81, 117,879.93 and 43,746.90

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Solution

The fourth proportional to 78,585.81, 117,879.93 and 43,746.90 is: 65,621.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,585.81 : 117,879.93 = 43,746.90 : x
  2. Step 2: Convert to fraction form
    78,585.81/117,879.93 = 43,746.90/x
  3. Step 3: Cross multiply
    78,585.81x = 117,879.93 × 43,746.90
  4. Step 4: Simplify right side
    78,585.81x = 5,156,881,509.72
  5. Step 5: Solve for x
    x = 5,156,881,509.72/78,585.81
  6. Step 6: Final answer
    x = 65,621.03

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1.5x scale

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.