Home / 210,205,698.45-315,307,400.73-85,707,838.67

Finding the Fourth Proportional to 210,205,698.45, 315,307,400.73 and 85,707,838.67

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Solution

The fourth proportional to 210,205,698.45, 315,307,400.73 and 85,707,838.67 is: 128,561,290.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,205,698.45 : 315,307,400.73 = 85,707,838.67 : x
  2. Step 2: Convert to fraction form
    210,205,698.45/315,307,400.73 = 85,707,838.67/x
  3. Step 3: Cross multiply
    210,205,698.45x = 315,307,400.73 × 85,707,838.67
  4. Step 4: Simplify right side
    210,205,698.45x = 27,024,315,831,237,664
  5. Step 5: Solve for x
    x = 27,024,315,831,237,664/210,205,698.45
  6. Step 6: Final answer
    x = 128,561,290.35

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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.