Home / 85,436,222.40-128,518,009.92-77,445,558.72

Finding the Fourth Proportional to 85,436,222.40, 128,518,009.92 and 77,445,558.72

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Solution

The fourth proportional to 85,436,222.40, 128,518,009.92 and 77,445,558.72 is: 116,498,000.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,436,222.40 : 128,518,009.92 = 77,445,558.72 : x
  2. Step 2: Convert to fraction form
    85,436,222.40/128,518,009.92 = 77,445,558.72/x
  3. Step 3: Cross multiply
    85,436,222.40x = 128,518,009.92 × 77,445,558.72
  4. Step 4: Simplify right side
    85,436,222.40x = 9,953,149,083,836,902
  5. Step 5: Solve for x
    x = 9,953,149,083,836,902/85,436,222.40
  6. Step 6: Final answer
    x = 116,498,000.55

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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.