Home / 280,909,145.48-421,321,146.06-76,453,153.16

Finding the Fourth Proportional to 280,909,145.48, 421,321,146.06 and 76,453,153.16

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Solution

The fourth proportional to 280,909,145.48, 421,321,146.06 and 76,453,153.16 is: 114,668,143.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,909,145.48 : 421,321,146.06 = 76,453,153.16 : x
  2. Step 2: Convert to fraction form
    280,909,145.48/421,321,146.06 = 76,453,153.16/x
  3. Step 3: Cross multiply
    280,909,145.48x = 421,321,146.06 × 76,453,153.16
  4. Step 4: Simplify right side
    280,909,145.48x = 32,211,330,109,271,908
  5. Step 5: Solve for x
    x = 32,211,330,109,271,908/280,909,145.48
  6. Step 6: Final answer
    x = 114,668,143.16

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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.