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Finding the Fourth Proportional to 67,688.40, 101,623.80 and 39,637.20

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Solution

The fourth proportional to 67,688.40, 101,623.80 and 39,637.20 is: 59,509.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,688.40 : 101,623.80 = 39,637.20 : x
  2. Step 2: Convert to fraction form
    67,688.40/101,623.80 = 39,637.20/x
  3. Step 3: Cross multiply
    67,688.40x = 101,623.80 × 39,637.20
  4. Step 4: Simplify right side
    67,688.40x = 4,028,082,885.36
  5. Step 5: Solve for x
    x = 4,028,082,885.36/67,688.40
  6. Step 6: Final answer
    x = 59,509.21

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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.