Home / 78,752,005.20-118,128,007.80-59,620,129.20

Finding the Fourth Proportional to 78,752,005.20, 118,128,007.80 and 59,620,129.20

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Solution

The fourth proportional to 78,752,005.20, 118,128,007.80 and 59,620,129.20 is: 89,430,193.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,752,005.20 : 118,128,007.80 = 59,620,129.20 : x
  2. Step 2: Convert to fraction form
    78,752,005.20/118,128,007.80 = 59,620,129.20/x
  3. Step 3: Cross multiply
    78,752,005.20x = 118,128,007.80 × 59,620,129.20
  4. Step 4: Simplify right side
    78,752,005.20x = 7,042,807,087,174,608
  5. Step 5: Solve for x
    x = 7,042,807,087,174,608/78,752,005.20
  6. Step 6: Final answer
    x = 89,430,193.80

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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.