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Finding the Fourth Proportional to 136,929.64, 188,693.72 and 104,700.74

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Solution

The fourth proportional to 136,929.64, 188,693.72 and 104,700.74 is: 144,281.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,929.64 : 188,693.72 = 104,700.74 : x
  2. Step 2: Convert to fraction form
    136,929.64/188,693.72 = 104,700.74/x
  3. Step 3: Cross multiply
    136,929.64x = 188,693.72 × 104,700.74
  4. Step 4: Simplify right side
    136,929.64x = 19,756,372,117.35
  5. Step 5: Solve for x
    x = 19,756,372,117.35/136,929.64
  6. Step 6: Final answer
    x = 144,281.20

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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.