Home / 154,356.10-212,943.80-90,665.19

Finding the Fourth Proportional to 154,356.10, 212,943.80 and 90,665.19

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Solution

The fourth proportional to 154,356.10, 212,943.80 and 90,665.19 is: 125,078.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,356.10 : 212,943.80 = 90,665.19 : x
  2. Step 2: Convert to fraction form
    154,356.10/212,943.80 = 90,665.19/x
  3. Step 3: Cross multiply
    154,356.10x = 212,943.80 × 90,665.19
  4. Step 4: Simplify right side
    154,356.10x = 19,306,590,312.99
  5. Step 5: Solve for x
    x = 19,306,590,312.99/154,356.10
  6. Step 6: Final answer
    x = 125,078.25

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1.5x scale

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.