Home / 401,376,415.20-602,064,622.80-128,774,738.40

Finding the Fourth Proportional to 401,376,415.20, 602,064,622.80 and 128,774,738.40

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Solution

The fourth proportional to 401,376,415.20, 602,064,622.80 and 128,774,738.40 is: 193,162,107.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,376,415.20 : 602,064,622.80 = 128,774,738.40 : x
  2. Step 2: Convert to fraction form
    401,376,415.20/602,064,622.80 = 128,774,738.40/x
  3. Step 3: Cross multiply
    401,376,415.20x = 602,064,622.80 × 128,774,738.40
  4. Step 4: Simplify right side
    401,376,415.20x = 77,530,714,300,964,672
  5. Step 5: Solve for x
    x = 77,530,714,300,964,672/401,376,415.20
  6. Step 6: Final answer
    x = 193,162,107.60

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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.