Finding the Fourth Proportional to 1,225,973,872.23, 1,692,807,921.05 and 987,060,138.63
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Solution
The fourth proportional to 1,225,973,872.23, 1,692,807,921.05 and 987,060,138.63 is: 1,362,919,111.96
Step by Step Solution
- Step 1: Write the proportion equation
1,225,973,872.23 : 1,692,807,921.05 = 987,060,138.63 : x - Step 2: Convert to fraction form
1,225,973,872.23/1,692,807,921.05 = 987,060,138.63/x - Step 3: Cross multiply
1,225,973,872.23x = 1,692,807,921.05 × 987,060,138.63 - Step 4: Simplify right side
1,225,973,872.23x = 1,670,903,221,225,575,168 - Step 5: Solve for x
x = 1,670,903,221,225,575,168/1,225,973,872.23 - Step 6: Final answer
x = 1,362,919,111.96
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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.