Finding the Fourth Proportional to 153,683,143.80, 212,087,765.31 and 87,602,443.08
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Solution
The fourth proportional to 153,683,143.80, 212,087,765.31 and 87,602,443.08 is: 120,894,236.86
Step by Step Solution
- Step 1: Write the proportion equation
153,683,143.80 : 212,087,765.31 = 87,602,443.08 : x - Step 2: Convert to fraction form
153,683,143.80/212,087,765.31 = 87,602,443.08/x - Step 3: Cross multiply
153,683,143.80x = 212,087,765.31 × 87,602,443.08 - Step 4: Simplify right side
153,683,143.80x = 18,579,406,388,533,672 - Step 5: Solve for x
x = 18,579,406,388,533,672/153,683,143.80 - Step 6: Final answer
x = 120,894,236.86
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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.