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Finding the Fourth Proportional to 85,486.40, 117,970.72 and 47,248.64

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Solution

The fourth proportional to 85,486.40, 117,970.72 and 47,248.64 is: 65,202.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,486.40 : 117,970.72 = 47,248.64 : x
  2. Step 2: Convert to fraction form
    85,486.40/117,970.72 = 47,248.64/x
  3. Step 3: Cross multiply
    85,486.40x = 117,970.72 × 47,248.64
  4. Step 4: Simplify right side
    85,486.40x = 5,573,956,079.82
  5. Step 5: Solve for x
    x = 5,573,956,079.82/85,486.40
  6. Step 6: Final answer
    x = 65,202.84

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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.