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Finding the Fourth Proportional to 64,729, 89,328.18 and 39,573.64

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Solution

The fourth proportional to 64,729, 89,328.18 and 39,573.64 is: 54,612.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,729 : 89,328.18 = 39,573.64 : x
  2. Step 2: Convert to fraction form
    64,729/89,328.18 = 39,573.64/x
  3. Step 3: Cross multiply
    64,729x = 89,328.18 × 39,573.64
  4. Step 4: Simplify right side
    64,729x = 3,535,041,237.18
  5. Step 5: Solve for x
    x = 3,535,041,237.18/64,729
  6. Step 6: Final answer
    x = 54,612.94

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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.