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Finding the Fourth Proportional to 171,681.36, 257,559.12 and 70,479.60

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Solution

The fourth proportional to 171,681.36, 257,559.12 and 70,479.60 is: 105,734.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,681.36 : 257,559.12 = 70,479.60 : x
  2. Step 2: Convert to fraction form
    171,681.36/257,559.12 = 70,479.60/x
  3. Step 3: Cross multiply
    171,681.36x = 257,559.12 × 70,479.60
  4. Step 4: Simplify right side
    171,681.36x = 18,152,663,753.95
  5. Step 5: Solve for x
    x = 18,152,663,753.95/171,681.36
  6. Step 6: Final answer
    x = 105,734.62

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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.