Home / 154,089.49-212,639.40-86,107.02

Finding the Fourth Proportional to 154,089.49, 212,639.40 and 86,107.02

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Solution

The fourth proportional to 154,089.49, 212,639.40 and 86,107.02 is: 118,825.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,089.49 : 212,639.40 = 86,107.02 : x
  2. Step 2: Convert to fraction form
    154,089.49/212,639.40 = 86,107.02/x
  3. Step 3: Cross multiply
    154,089.49x = 212,639.40 × 86,107.02
  4. Step 4: Simplify right side
    154,089.49x = 18,309,745,068.59
  5. Step 5: Solve for x
    x = 18,309,745,068.59/154,089.49
  6. Step 6: Final answer
    x = 118,825.40

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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.