Home / 128,648,434.40-192,972,651.60-51,931,973.60

Finding the Fourth Proportional to 128,648,434.40, 192,972,651.60 and 51,931,973.60

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Solution

The fourth proportional to 128,648,434.40, 192,972,651.60 and 51,931,973.60 is: 77,897,960.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,648,434.40 : 192,972,651.60 = 51,931,973.60 : x
  2. Step 2: Convert to fraction form
    128,648,434.40/192,972,651.60 = 51,931,973.60/x
  3. Step 3: Cross multiply
    128,648,434.40x = 192,972,651.60 × 51,931,973.60
  4. Step 4: Simplify right side
    128,648,434.40x = 10,021,450,648,413,198
  5. Step 5: Solve for x
    x = 10,021,450,648,413,198/128,648,434.40
  6. Step 6: Final answer
    x = 77,897,960.40

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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.