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Finding the Fourth Proportional to 99,130.48, 136,913.60 and 65,290.32

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Solution

The fourth proportional to 99,130.48, 136,913.60 and 65,290.32 is: 90,175.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,130.48 : 136,913.60 = 65,290.32 : x
  2. Step 2: Convert to fraction form
    99,130.48/136,913.60 = 65,290.32/x
  3. Step 3: Cross multiply
    99,130.48x = 136,913.60 × 65,290.32
  4. Step 4: Simplify right side
    99,130.48x = 8,939,132,756.35
  5. Step 5: Solve for x
    x = 8,939,132,756.35/99,130.48
  6. Step 6: Final answer
    x = 90,175.42

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Why These Related Problems?

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