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Finding the Fourth Proportional to 64,906.40, 97,143.60 and 47,086.40

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Solution

The fourth proportional to 64,906.40, 97,143.60 and 47,086.40 is: 70,472.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,906.40 : 97,143.60 = 47,086.40 : x
  2. Step 2: Convert to fraction form
    64,906.40/97,143.60 = 47,086.40/x
  3. Step 3: Cross multiply
    64,906.40x = 97,143.60 × 47,086.40
  4. Step 4: Simplify right side
    64,906.40x = 4,574,142,407.04
  5. Step 5: Solve for x
    x = 4,574,142,407.04/64,906.40
  6. Step 6: Final answer
    x = 70,472.90

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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.