Finding the Fourth Proportional to 217,178.79, 299,706.53 and 121,686.17
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Solution
The fourth proportional to 217,178.79, 299,706.53 and 121,686.17 is: 167,926.79
Step by Step Solution
- Step 1: Write the proportion equation
217,178.79 : 299,706.53 = 121,686.17 : x - Step 2: Convert to fraction form
217,178.79/299,706.53 = 121,686.17/x - Step 3: Cross multiply
217,178.79x = 299,706.53 × 121,686.17 - Step 4: Simplify right side
217,178.79x = 36,470,137,652.73 - Step 5: Solve for x
x = 36,470,137,652.73/217,178.79 - Step 6: Final answer
x = 167,926.79
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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.