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Finding the Fourth Proportional to 157,271.40, 217,108.08 and 100,715.04

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Solution

The fourth proportional to 157,271.40, 217,108.08 and 100,715.04 is: 139,033.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,271.40 : 217,108.08 = 100,715.04 : x
  2. Step 2: Convert to fraction form
    157,271.40/217,108.08 = 100,715.04/x
  3. Step 3: Cross multiply
    157,271.40x = 217,108.08 × 100,715.04
  4. Step 4: Simplify right side
    157,271.40x = 21,866,048,961.52
  5. Step 5: Solve for x
    x = 21,866,048,961.52/157,271.40
  6. Step 6: Final answer
    x = 139,033.85

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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.