Home / 154,155.24-212,729.74-86,172.36

Finding the Fourth Proportional to 154,155.24, 212,729.74 and 86,172.36

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Solution

The fourth proportional to 154,155.24, 212,729.74 and 86,172.36 is: 118,915.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,155.24 : 212,729.74 = 86,172.36 : x
  2. Step 2: Convert to fraction form
    154,155.24/212,729.74 = 86,172.36/x
  3. Step 3: Cross multiply
    154,155.24x = 212,729.74 × 86,172.36
  4. Step 4: Simplify right side
    154,155.24x = 18,331,423,737.99
  5. Step 5: Solve for x
    x = 18,331,423,737.99/154,155.24
  6. Step 6: Final answer
    x = 118,915.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.