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Finding the Fourth Proportional to 85,393.60, 117,838.28 and 47,670.24

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Solution

The fourth proportional to 85,393.60, 117,838.28 and 47,670.24 is: 65,782.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,393.60 : 117,838.28 = 47,670.24 : x
  2. Step 2: Convert to fraction form
    85,393.60/117,838.28 = 47,670.24/x
  3. Step 3: Cross multiply
    85,393.60x = 117,838.28 × 47,670.24
  4. Step 4: Simplify right side
    85,393.60x = 5,617,379,088.79
  5. Step 5: Solve for x
    x = 5,617,379,088.79/85,393.60
  6. Step 6: Final answer
    x = 65,782.20

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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.