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Finding the Fourth Proportional to 612,145.50, 918,271.17 and 168,913.50

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Solution

The fourth proportional to 612,145.50, 918,271.17 and 168,913.50 is: 253,384.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,145.50 : 918,271.17 = 168,913.50 : x
  2. Step 2: Convert to fraction form
    612,145.50/918,271.17 = 168,913.50/x
  3. Step 3: Cross multiply
    612,145.50x = 918,271.17 × 168,913.50
  4. Step 4: Simplify right side
    612,145.50x = 155,108,397,273.80
  5. Step 5: Solve for x
    x = 155,108,397,273.80/612,145.50
  6. Step 6: Final answer
    x = 253,384.85

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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.