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Finding the Fourth Proportional to 147,072.40, 220,615.80 and 77,088.40

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Solution

The fourth proportional to 147,072.40, 220,615.80 and 77,088.40 is: 115,636.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,072.40 : 220,615.80 = 77,088.40 : x
  2. Step 2: Convert to fraction form
    147,072.40/220,615.80 = 77,088.40/x
  3. Step 3: Cross multiply
    147,072.40x = 220,615.80 × 77,088.40
  4. Step 4: Simplify right side
    147,072.40x = 17,006,919,036.72
  5. Step 5: Solve for x
    x = 17,006,919,036.72/147,072.40
  6. Step 6: Final answer
    x = 115,636.37

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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.