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Finding the Fourth Proportional to 425,007.18, 637,490.28 and 105,157.74

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Solution

The fourth proportional to 425,007.18, 637,490.28 and 105,157.74 is: 157,731.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,007.18 : 637,490.28 = 105,157.74 : x
  2. Step 2: Convert to fraction form
    425,007.18/637,490.28 = 105,157.74/x
  3. Step 3: Cross multiply
    425,007.18x = 637,490.28 × 105,157.74
  4. Step 4: Simplify right side
    425,007.18x = 67,037,037,116.77
  5. Step 5: Solve for x
    x = 67,037,037,116.77/425,007.18
  6. Step 6: Final answer
    x = 157,731.54

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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.