Home / 287,670,420.80-431,561,618.40-83,205,166.40

Finding the Fourth Proportional to 287,670,420.80, 431,561,618.40 and 83,205,166.40

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Solution

The fourth proportional to 287,670,420.80, 431,561,618.40 and 83,205,166.40 is: 124,823,943.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,670,420.80 : 431,561,618.40 = 83,205,166.40 : x
  2. Step 2: Convert to fraction form
    287,670,420.80/431,561,618.40 = 83,205,166.40/x
  3. Step 3: Cross multiply
    287,670,420.80x = 431,561,618.40 × 83,205,166.40
  4. Step 4: Simplify right side
    287,670,420.80x = 35,908,156,270,825,304
  5. Step 5: Solve for x
    x = 35,908,156,270,825,304/287,670,420.80
  6. Step 6: Final answer
    x = 124,823,943.22

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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.