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Finding the Fourth Proportional to 64,605.16, 96,908.70 and 42,559.72

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Solution

The fourth proportional to 64,605.16, 96,908.70 and 42,559.72 is: 63,840.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,605.16 : 96,908.70 = 42,559.72 : x
  2. Step 2: Convert to fraction form
    64,605.16/96,908.70 = 42,559.72/x
  3. Step 3: Cross multiply
    64,605.16x = 96,908.70 × 42,559.72
  4. Step 4: Simplify right side
    64,605.16x = 4,124,407,137.56
  5. Step 5: Solve for x
    x = 4,124,407,137.56/64,605.16
  6. Step 6: Final answer
    x = 63,840.21

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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.