Home / 111,702.65-154,135.91-66,381.53

Finding the Fourth Proportional to 111,702.65, 154,135.91 and 66,381.53

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Solution

The fourth proportional to 111,702.65, 154,135.91 and 66,381.53 is: 91,598.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,702.65 : 154,135.91 = 66,381.53 : x
  2. Step 2: Convert to fraction form
    111,702.65/154,135.91 = 66,381.53/x
  3. Step 3: Cross multiply
    111,702.65x = 154,135.91 × 66,381.53
  4. Step 4: Simplify right side
    111,702.65x = 10,231,776,929.02
  5. Step 5: Solve for x
    x = 10,231,776,929.02/111,702.65
  6. Step 6: Final answer
    x = 91,598.34

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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.