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Finding the Fourth Proportional to 157,909.56, 217,908.66 and 93,420.60

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Solution

The fourth proportional to 157,909.56, 217,908.66 and 93,420.60 is: 128,916.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,909.56 : 217,908.66 = 93,420.60 : x
  2. Step 2: Convert to fraction form
    157,909.56/217,908.66 = 93,420.60/x
  3. Step 3: Cross multiply
    157,909.56x = 217,908.66 × 93,420.60
  4. Step 4: Simplify right side
    157,909.56x = 20,357,157,762.40
  5. Step 5: Solve for x
    x = 20,357,157,762.40/157,909.56
  6. Step 6: Final answer
    x = 128,916.56

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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.