Home / 208,289.17-312,444.68-66,145.78

Finding the Fourth Proportional to 208,289.17, 312,444.68 and 66,145.78

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Solution

The fourth proportional to 208,289.17, 312,444.68 and 66,145.78 is: 99,222.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,289.17 : 312,444.68 = 66,145.78 : x
  2. Step 2: Convert to fraction form
    208,289.17/312,444.68 = 66,145.78/x
  3. Step 3: Cross multiply
    208,289.17x = 312,444.68 × 66,145.78
  4. Step 4: Simplify right side
    208,289.17x = 20,666,897,125.28
  5. Step 5: Solve for x
    x = 20,666,897,125.28/208,289.17
  6. Step 6: Final answer
    x = 99,222.14

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1.5x scale

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.