Home / 280,229,499.79-420,384,364.73-86,157,208.37

Finding the Fourth Proportional to 280,229,499.79, 420,384,364.73 and 86,157,208.37

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Solution

The fourth proportional to 280,229,499.79, 420,384,364.73 and 86,157,208.37 is: 129,248,146.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,229,499.79 : 420,384,364.73 = 86,157,208.37 : x
  2. Step 2: Convert to fraction form
    280,229,499.79/420,384,364.73 = 86,157,208.37/x
  3. Step 3: Cross multiply
    280,229,499.79x = 420,384,364.73 × 86,157,208.37
  4. Step 4: Simplify right side
    280,229,499.79x = 36,219,143,308,475,952
  5. Step 5: Solve for x
    x = 36,219,143,308,475,952/280,229,499.79
  6. Step 6: Final answer
    x = 129,248,146.02

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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.