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Finding the Fourth Proportional to 64,804.32, 89,428.80 and 36,509.40

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Solution

The fourth proportional to 64,804.32, 89,428.80 and 36,509.40 is: 50,382.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,804.32 : 89,428.80 = 36,509.40 : x
  2. Step 2: Convert to fraction form
    64,804.32/89,428.80 = 36,509.40/x
  3. Step 3: Cross multiply
    64,804.32x = 89,428.80 × 36,509.40
  4. Step 4: Simplify right side
    64,804.32x = 3,264,991,830.72
  5. Step 5: Solve for x
    x = 3,264,991,830.72/64,804.32
  6. Step 6: Final answer
    x = 50,382.32

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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.