Finding the Fourth Proportional to 287,838,126.90, 431,730,421.35 and 80,595,295.14
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Solution
The fourth proportional to 287,838,126.90, 431,730,421.35 and 80,595,295.14 is: 120,885,447.33
Step by Step Solution
- Step 1: Write the proportion equation
287,838,126.90 : 431,730,421.35 = 80,595,295.14 : x - Step 2: Convert to fraction form
287,838,126.90/431,730,421.35 = 80,595,295.14/x - Step 3: Cross multiply
287,838,126.90x = 431,730,421.35 × 80,595,295.14 - Step 4: Simplify right side
287,838,126.90x = 34,795,440,729,619,808 - Step 5: Solve for x
x = 34,795,440,729,619,808/287,838,126.90 - Step 6: Final answer
x = 120,885,447.33
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.