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Finding the Fourth Proportional to 425,008.18, 637,491.78 and 105,158.74

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Solution

The fourth proportional to 425,008.18, 637,491.78 and 105,158.74 is: 157,733.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,008.18 : 637,491.78 = 105,158.74 : x
  2. Step 2: Convert to fraction form
    425,008.18/637,491.78 = 105,158.74/x
  3. Step 3: Cross multiply
    425,008.18x = 637,491.78 × 105,158.74
  4. Step 4: Simplify right side
    425,008.18x = 67,037,832,345.16
  5. Step 5: Solve for x
    x = 67,037,832,345.16/425,008.18
  6. Step 6: Final answer
    x = 157,733.04

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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.