Home / 309,619,586.87-427,275,100.31-170,390,348.63

Finding the Fourth Proportional to 309,619,586.87, 427,275,100.31 and 170,390,348.63

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Solution

The fourth proportional to 309,619,586.87, 427,275,100.31 and 170,390,348.63 is: 235,138,719.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,619,586.87 : 427,275,100.31 = 170,390,348.63 : x
  2. Step 2: Convert to fraction form
    309,619,586.87/427,275,100.31 = 170,390,348.63/x
  3. Step 3: Cross multiply
    309,619,586.87x = 427,275,100.31 × 170,390,348.63
  4. Step 4: Simplify right side
    309,619,586.87x = 72,803,553,303,754,368
  5. Step 5: Solve for x
    x = 72,803,553,303,754,368/309,619,586.87
  6. Step 6: Final answer
    x = 235,138,719.87

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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.