Home / 154,653.90-213,440.15-86,689.26

Finding the Fourth Proportional to 154,653.90, 213,440.15 and 86,689.26

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Solution

The fourth proportional to 154,653.90, 213,440.15 and 86,689.26 is: 119,641.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,653.90 : 213,440.15 = 86,689.26 : x
  2. Step 2: Convert to fraction form
    154,653.90/213,440.15 = 86,689.26/x
  3. Step 3: Cross multiply
    154,653.90x = 213,440.15 × 86,689.26
  4. Step 4: Simplify right side
    154,653.90x = 18,502,968,657.79
  5. Step 5: Solve for x
    x = 18,502,968,657.79/154,653.90
  6. Step 6: Final answer
    x = 119,641.14

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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.