Home / 85,915,400.70-128,943,603.45-85,243,554.30

Finding the Fourth Proportional to 85,915,400.70, 128,943,603.45 and 85,243,554.30

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Solution

The fourth proportional to 85,915,400.70, 128,943,603.45 and 85,243,554.30 is: 127,935,282.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,915,400.70 : 128,943,603.45 = 85,243,554.30 : x
  2. Step 2: Convert to fraction form
    85,915,400.70/128,943,603.45 = 85,243,554.30/x
  3. Step 3: Cross multiply
    85,915,400.70x = 128,943,603.45 × 85,243,554.30
  4. Step 4: Simplify right side
    85,915,400.70x = 10,991,611,062,327,742
  5. Step 5: Solve for x
    x = 10,991,611,062,327,742/85,915,400.70
  6. Step 6: Final answer
    x = 127,935,282.53

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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.