Finding the Fourth Proportional to 145,668,340.62, 201,019,964.09 and 79,587,421.20
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Solution
The fourth proportional to 145,668,340.62, 201,019,964.09 and 79,587,421.20 is: 109,829,359.51
Step by Step Solution
- Step 1: Write the proportion equation
145,668,340.62 : 201,019,964.09 = 79,587,421.20 : x - Step 2: Convert to fraction form
145,668,340.62/201,019,964.09 = 79,587,421.20/x - Step 3: Cross multiply
145,668,340.62x = 201,019,964.09 × 79,587,421.20 - Step 4: Simplify right side
145,668,340.62x = 15,998,660,551,241,768 - Step 5: Solve for x
x = 15,998,660,551,241,768/145,668,340.62 - Step 6: Final answer
x = 109,829,359.51
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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.