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Finding the Fourth Proportional to 154,368.84, 212,824.80 and 111,312.30

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Solution

The fourth proportional to 154,368.84, 212,824.80 and 111,312.30 is: 153,463.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,368.84 : 212,824.80 = 111,312.30 : x
  2. Step 2: Convert to fraction form
    154,368.84/212,824.80 = 111,312.30/x
  3. Step 3: Cross multiply
    154,368.84x = 212,824.80 × 111,312.30
  4. Step 4: Simplify right side
    154,368.84x = 23,690,017,985.04
  5. Step 5: Solve for x
    x = 23,690,017,985.04/154,368.84
  6. Step 6: Final answer
    x = 153,463.73

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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.