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Finding the Fourth Proportional to 122,381.20, 183,485.40 and 47,472.40

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Solution

The fourth proportional to 122,381.20, 183,485.40 and 47,472.40 is: 71,175.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,381.20 : 183,485.40 = 47,472.40 : x
  2. Step 2: Convert to fraction form
    122,381.20/183,485.40 = 47,472.40/x
  3. Step 3: Cross multiply
    122,381.20x = 183,485.40 × 47,472.40
  4. Step 4: Simplify right side
    122,381.20x = 8,710,492,302.96
  5. Step 5: Solve for x
    x = 8,710,492,302.96/122,381.20
  6. Step 6: Final answer
    x = 71,175.08

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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.