Home / 428,047,420.80-642,071,131.20-104,931,292.80

Finding the Fourth Proportional to 428,047,420.80, 642,071,131.20 and 104,931,292.80

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Solution

The fourth proportional to 428,047,420.80, 642,071,131.20 and 104,931,292.80 is: 157,396,939.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,047,420.80 : 642,071,131.20 = 104,931,292.80 : x
  2. Step 2: Convert to fraction form
    428,047,420.80/642,071,131.20 = 104,931,292.80/x
  3. Step 3: Cross multiply
    428,047,420.80x = 642,071,131.20 × 104,931,292.80
  4. Step 4: Simplify right side
    428,047,420.80x = 67,373,353,866,374,416
  5. Step 5: Solve for x
    x = 67,373,353,866,374,416/428,047,420.80
  6. Step 6: Final answer
    x = 157,396,939.20

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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.