Home / 154,063.89-212,588.63-90,378.45

Finding the Fourth Proportional to 154,063.89, 212,588.63 and 90,378.45

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Solution

The fourth proportional to 154,063.89, 212,588.63 and 90,378.45 is: 124,710.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,063.89 : 212,588.63 = 90,378.45 : x
  2. Step 2: Convert to fraction form
    154,063.89/212,588.63 = 90,378.45/x
  3. Step 3: Cross multiply
    154,063.89x = 212,588.63 × 90,378.45
  4. Step 4: Simplify right side
    154,063.89x = 19,213,430,867.02
  5. Step 5: Solve for x
    x = 19,213,430,867.02/154,063.89
  6. Step 6: Final answer
    x = 124,710.80

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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.