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Finding the Fourth Proportional to 91,376,603.80, 137,064,905.70 and 87,345,525.40

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Solution

The fourth proportional to 91,376,603.80, 137,064,905.70 and 87,345,525.40 is: 131,018,288.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,376,603.80 : 137,064,905.70 = 87,345,525.40 : x
  2. Step 2: Convert to fraction form
    91,376,603.80/137,064,905.70 = 87,345,525.40/x
  3. Step 3: Cross multiply
    91,376,603.80x = 137,064,905.70 × 87,345,525.40
  4. Step 4: Simplify right side
    91,376,603.80x = 11,972,006,202,267,954
  5. Step 5: Solve for x
    x = 11,972,006,202,267,954/91,376,603.80
  6. Step 6: Final answer
    x = 131,018,288.10

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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.