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Finding the Fourth Proportional to 154,485.90, 231,534.45 and 136,989.90

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Solution

The fourth proportional to 154,485.90, 231,534.45 and 136,989.90 is: 205,312.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,485.90 : 231,534.45 = 136,989.90 : x
  2. Step 2: Convert to fraction form
    154,485.90/231,534.45 = 136,989.90/x
  3. Step 3: Cross multiply
    154,485.90x = 231,534.45 × 136,989.90
  4. Step 4: Simplify right side
    154,485.90x = 31,717,881,152.06
  5. Step 5: Solve for x
    x = 31,717,881,152.06/154,485.90
  6. Step 6: Final answer
    x = 205,312.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.