Home / 428,323,285.20-642,484,927.80-105,207,157.20

Finding the Fourth Proportional to 428,323,285.20, 642,484,927.80 and 105,207,157.20

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Solution

The fourth proportional to 428,323,285.20, 642,484,927.80 and 105,207,157.20 is: 157,810,735.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,323,285.20 : 642,484,927.80 = 105,207,157.20 : x
  2. Step 2: Convert to fraction form
    428,323,285.20/642,484,927.80 = 105,207,157.20/x
  3. Step 3: Cross multiply
    428,323,285.20x = 642,484,927.80 × 105,207,157.20
  4. Step 4: Simplify right side
    428,323,285.20x = 67,594,012,797,685,248
  5. Step 5: Solve for x
    x = 67,594,012,797,685,248/428,323,285.20
  6. Step 6: Final answer
    x = 157,810,735.80

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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.