Home / 100,287,987.60-150,431,981.40-91,678,643.40

Finding the Fourth Proportional to 100,287,987.60, 150,431,981.40 and 91,678,643.40

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Solution

The fourth proportional to 100,287,987.60, 150,431,981.40 and 91,678,643.40 is: 137,517,965.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,287,987.60 : 150,431,981.40 = 91,678,643.40 : x
  2. Step 2: Convert to fraction form
    100,287,987.60/150,431,981.40 = 91,678,643.40/x
  3. Step 3: Cross multiply
    100,287,987.60x = 150,431,981.40 × 91,678,643.40
  4. Step 4: Simplify right side
    100,287,987.60x = 13,791,399,978,726,034
  5. Step 5: Solve for x
    x = 13,791,399,978,726,034/100,287,987.60
  6. Step 6: Final answer
    x = 137,517,965.10

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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.