Home / 145,152,004.80-217,728,007.20-81,318,302.40

Finding the Fourth Proportional to 145,152,004.80, 217,728,007.20 and 81,318,302.40

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Solution

The fourth proportional to 145,152,004.80, 217,728,007.20 and 81,318,302.40 is: 121,977,453.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,152,004.80 : 217,728,007.20 = 81,318,302.40 : x
  2. Step 2: Convert to fraction form
    145,152,004.80/217,728,007.20 = 81,318,302.40/x
  3. Step 3: Cross multiply
    145,152,004.80x = 217,728,007.20 × 81,318,302.40
  4. Step 4: Simplify right side
    145,152,004.80x = 17,705,271,930,438,978
  5. Step 5: Solve for x
    x = 17,705,271,930,438,978/145,152,004.80
  6. Step 6: Final answer
    x = 121,977,453.60

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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.