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Finding the Fourth Proportional to 262,655,807.20, 393,983,710.80 and 80,879,365.60

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Solution

The fourth proportional to 262,655,807.20, 393,983,710.80 and 80,879,365.60 is: 121,319,048.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,655,807.20 : 393,983,710.80 = 80,879,365.60 : x
  2. Step 2: Convert to fraction form
    262,655,807.20/393,983,710.80 = 80,879,365.60/x
  3. Step 3: Cross multiply
    262,655,807.20x = 393,983,710.80 × 80,879,365.60
  4. Step 4: Simplify right side
    262,655,807.20x = 31,865,152,586,237,868
  5. Step 5: Solve for x
    x = 31,865,152,586,237,868/262,655,807.20
  6. Step 6: Final answer
    x = 121,319,048.40

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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.