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Finding the Fourth Proportional to 64,999.50, 89,699.90 and 38,142.45

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Solution

The fourth proportional to 64,999.50, 89,699.90 and 38,142.45 is: 52,636.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,999.50 : 89,699.90 = 38,142.45 : x
  2. Step 2: Convert to fraction form
    64,999.50/89,699.90 = 38,142.45/x
  3. Step 3: Cross multiply
    64,999.50x = 89,699.90 × 38,142.45
  4. Step 4: Simplify right side
    64,999.50x = 3,421,373,760.04
  5. Step 5: Solve for x
    x = 3,421,373,760.04/64,999.50
  6. Step 6: Final answer
    x = 52,636.93

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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.