Home / 85,850,631.92-128,776,020.60-21,154,445.84

Finding the Fourth Proportional to 85,850,631.92, 128,776,020.60 and 21,154,445.84

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Solution

The fourth proportional to 85,850,631.92, 128,776,020.60 and 21,154,445.84 is: 31,731,686.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,850,631.92 : 128,776,020.60 = 21,154,445.84 : x
  2. Step 2: Convert to fraction form
    85,850,631.92/128,776,020.60 = 21,154,445.84/x
  3. Step 3: Cross multiply
    85,850,631.92x = 128,776,020.60 × 21,154,445.84
  4. Step 4: Simplify right side
    85,850,631.92x = 2,724,185,353,273,424
  5. Step 5: Solve for x
    x = 2,724,185,353,273,424/85,850,631.92
  6. Step 6: Final answer
    x = 31,731,686.68

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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.