Finding the Fourth Proportional to 90,660,739.20, 135,701,768.70 and 71,528,863.20
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Solution
The fourth proportional to 90,660,739.20, 135,701,768.70 and 71,528,863.20 is: 107,065,013.31
Step by Step Solution
- Step 1: Write the proportion equation
90,660,739.20 : 135,701,768.70 = 71,528,863.20 : x - Step 2: Convert to fraction form
90,660,739.20/135,701,768.70 = 71,528,863.20/x - Step 3: Cross multiply
90,660,739.20x = 135,701,768.70 × 71,528,863.20 - Step 4: Simplify right side
90,660,739.20x = 9,706,593,249,340,342 - Step 5: Solve for x
x = 9,706,593,249,340,342/90,660,739.20 - Step 6: Final answer
x = 107,065,013.31
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.