Home / 85,409,623.40-128,114,435.10-31,545,789.80

Finding the Fourth Proportional to 85,409,623.40, 128,114,435.10 and 31,545,789.80

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Solution

The fourth proportional to 85,409,623.40, 128,114,435.10 and 31,545,789.80 is: 47,318,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,409,623.40 : 128,114,435.10 = 31,545,789.80 : x
  2. Step 2: Convert to fraction form
    85,409,623.40/128,114,435.10 = 31,545,789.80/x
  3. Step 3: Cross multiply
    85,409,623.40x = 128,114,435.10 × 31,545,789.80
  4. Step 4: Simplify right side
    85,409,623.40x = 4,041,471,040,010,342
  5. Step 5: Solve for x
    x = 4,041,471,040,010,342/85,409,623.40
  6. Step 6: Final answer
    x = 47,318,684.70

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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.