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Finding the Fourth Proportional to 102,290.40, 153,176.40 and 81,554.40

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Solution

The fourth proportional to 102,290.40, 153,176.40 and 81,554.40 is: 122,124.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,290.40 : 153,176.40 = 81,554.40 : x
  2. Step 2: Convert to fraction form
    102,290.40/153,176.40 = 81,554.40/x
  3. Step 3: Cross multiply
    102,290.40x = 153,176.40 × 81,554.40
  4. Step 4: Simplify right side
    102,290.40x = 12,492,209,396.16
  5. Step 5: Solve for x
    x = 12,492,209,396.16/102,290.40
  6. Step 6: Final answer
    x = 122,124.94

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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.