Home / 290,304,050.40-435,456,075.60-128,745,986.40

Finding the Fourth Proportional to 290,304,050.40, 435,456,075.60 and 128,745,986.40

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Solution

The fourth proportional to 290,304,050.40, 435,456,075.60 and 128,745,986.40 is: 193,118,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,304,050.40 : 435,456,075.60 = 128,745,986.40 : x
  2. Step 2: Convert to fraction form
    290,304,050.40/435,456,075.60 = 128,745,986.40/x
  3. Step 3: Cross multiply
    290,304,050.40x = 435,456,075.60 × 128,745,986.40
  4. Step 4: Simplify right side
    290,304,050.40x = 56,063,221,986,994,976
  5. Step 5: Solve for x
    x = 56,063,221,986,994,976/290,304,050.40
  6. Step 6: Final answer
    x = 193,118,979.60

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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.