Home / 138,300,340.16-190,865,349.03-78,764,153.65

Finding the Fourth Proportional to 138,300,340.16, 190,865,349.03 and 78,764,153.65

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Solution

The fourth proportional to 138,300,340.16, 190,865,349.03 and 78,764,153.65 is: 108,700,728.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,300,340.16 : 190,865,349.03 = 78,764,153.65 : x
  2. Step 2: Convert to fraction form
    138,300,340.16/190,865,349.03 = 78,764,153.65/x
  3. Step 3: Cross multiply
    138,300,340.16x = 190,865,349.03 × 78,764,153.65
  4. Step 4: Simplify right side
    138,300,340.16x = 15,033,347,677,278,000
  5. Step 5: Solve for x
    x = 15,033,347,677,278,000/138,300,340.16
  6. Step 6: Final answer
    x = 108,700,728.14

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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.