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Finding the Fourth Proportional to 85,079.36, 117,407.52 and 47,352.80

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Solution

The fourth proportional to 85,079.36, 117,407.52 and 47,352.80 is: 65,345.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,079.36 : 117,407.52 = 47,352.80 : x
  2. Step 2: Convert to fraction form
    85,079.36/117,407.52 = 47,352.80/x
  3. Step 3: Cross multiply
    85,079.36x = 117,407.52 × 47,352.80
  4. Step 4: Simplify right side
    85,079.36x = 5,559,574,813.06
  5. Step 5: Solve for x
    x = 5,559,574,813.06/85,079.36
  6. Step 6: Final answer
    x = 65,345.75

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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.