Home / 154,152.12-212,702.70-86,147.36

Finding the Fourth Proportional to 154,152.12, 212,702.70 and 86,147.36

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Solution

The fourth proportional to 154,152.12, 212,702.70 and 86,147.36 is: 118,868.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,152.12 : 212,702.70 = 86,147.36 : x
  2. Step 2: Convert to fraction form
    154,152.12/212,702.70 = 86,147.36/x
  3. Step 3: Cross multiply
    154,152.12x = 212,702.70 × 86,147.36
  4. Step 4: Simplify right side
    154,152.12x = 18,323,776,069.87
  5. Step 5: Solve for x
    x = 18,323,776,069.87/154,152.12
  6. Step 6: Final answer
    x = 118,868.14

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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.