Home / 209,236,931.10-288,786,940.47-138,547,860.06

Finding the Fourth Proportional to 209,236,931.10, 288,786,940.47 and 138,547,860.06

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Solution

The fourth proportional to 209,236,931.10, 288,786,940.47 and 138,547,860.06 is: 191,222,517.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,236,931.10 : 288,786,940.47 = 138,547,860.06 : x
  2. Step 2: Convert to fraction form
    209,236,931.10/288,786,940.47 = 138,547,860.06/x
  3. Step 3: Cross multiply
    209,236,931.10x = 288,786,940.47 × 138,547,860.06
  4. Step 4: Simplify right side
    209,236,931.10x = 40,010,812,615,393,112
  5. Step 5: Solve for x
    x = 40,010,812,615,393,112/209,236,931.10
  6. Step 6: Final answer
    x = 191,222,517.01

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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.