Home / 78,632,510.13-117,940,793.58-21,117,307.91

Finding the Fourth Proportional to 78,632,510.13, 117,940,793.58 and 21,117,307.91

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Solution

The fourth proportional to 78,632,510.13, 117,940,793.58 and 21,117,307.91 is: 31,673,821.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,632,510.13 : 117,940,793.58 = 21,117,307.91 : x
  2. Step 2: Convert to fraction form
    78,632,510.13/117,940,793.58 = 21,117,307.91/x
  3. Step 3: Cross multiply
    78,632,510.13x = 117,940,793.58 × 21,117,307.91
  4. Step 4: Simplify right side
    78,632,510.13x = 2,490,592,052,588,907.50
  5. Step 5: Solve for x
    x = 2,490,592,052,588,907.50/78,632,510.13
  6. Step 6: Final answer
    x = 31,673,821.02

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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.