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Finding the Fourth Proportional to 102,653.70, 153,980.55 and 74,441.40

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Solution

The fourth proportional to 102,653.70, 153,980.55 and 74,441.40 is: 111,662.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,653.70 : 153,980.55 = 74,441.40 : x
  2. Step 2: Convert to fraction form
    102,653.70/153,980.55 = 74,441.40/x
  3. Step 3: Cross multiply
    102,653.70x = 153,980.55 × 74,441.40
  4. Step 4: Simplify right side
    102,653.70x = 11,462,527,714.77
  5. Step 5: Solve for x
    x = 11,462,527,714.77/102,653.70
  6. Step 6: Final answer
    x = 111,662.10

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1.5x scale

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.