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Finding the Fourth Proportional to 79,051.90, 118,598.10 and 45,712.30

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Solution

The fourth proportional to 79,051.90, 118,598.10 and 45,712.30 is: 68,580.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,051.90 : 118,598.10 = 45,712.30 : x
  2. Step 2: Convert to fraction form
    79,051.90/118,598.10 = 45,712.30/x
  3. Step 3: Cross multiply
    79,051.90x = 118,598.10 × 45,712.30
  4. Step 4: Simplify right side
    79,051.90x = 5,421,391,926.63
  5. Step 5: Solve for x
    x = 5,421,391,926.63/79,051.90
  6. Step 6: Final answer
    x = 68,580.16

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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.