Finding the Fourth Proportional to 217,189,157.16, 299,817,652.74 and 129,111,668.52
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Solution
The fourth proportional to 217,189,157.16, 299,817,652.74 and 129,111,668.52 is: 178,231,537.45
Step by Step Solution
- Step 1: Write the proportion equation
217,189,157.16 : 299,817,652.74 = 129,111,668.52 : x - Step 2: Convert to fraction form
217,189,157.16/299,817,652.74 = 129,111,668.52/x - Step 3: Cross multiply
217,189,157.16x = 299,817,652.74 × 129,111,668.52 - Step 4: Simplify right side
217,189,157.16x = 38,709,957,397,011,352 - Step 5: Solve for x
x = 38,709,957,397,011,352/217,189,157.16 - Step 6: Final answer
x = 178,231,537.45
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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.