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Finding the Fourth Proportional to 129,636, 178,897.80 and 70,020

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Solution

The fourth proportional to 129,636, 178,897.80 and 70,020 is: 96,627.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,636 : 178,897.80 = 70,020 : x
  2. Step 2: Convert to fraction form
    129,636/178,897.80 = 70,020/x
  3. Step 3: Cross multiply
    129,636x = 178,897.80 × 70,020
  4. Step 4: Simplify right side
    129,636x = 12,526,423,956
  5. Step 5: Solve for x
    x = 12,526,423,956/129,636
  6. Step 6: Final answer
    x = 96,627.66

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.