Home / 145,152,021.60-217,728,032.40-87,821,128.80

Finding the Fourth Proportional to 145,152,021.60, 217,728,032.40 and 87,821,128.80

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Solution

The fourth proportional to 145,152,021.60, 217,728,032.40 and 87,821,128.80 is: 131,731,693.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,152,021.60 : 217,728,032.40 = 87,821,128.80 : x
  2. Step 2: Convert to fraction form
    145,152,021.60/217,728,032.40 = 87,821,128.80/x
  3. Step 3: Cross multiply
    145,152,021.60x = 217,728,032.40 × 87,821,128.80
  4. Step 4: Simplify right side
    145,152,021.60x = 19,121,121,576,770,972
  5. Step 5: Solve for x
    x = 19,121,121,576,770,972/145,152,021.60
  6. Step 6: Final answer
    x = 131,731,693.20

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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.