Finding the Fourth Proportional to 213,163,210.80, 319,319,663.40 and 148,539,985.20
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Solution
The fourth proportional to 213,163,210.80, 319,319,663.40 and 148,539,985.20 is: 222,513,715.65
Step by Step Solution
- Step 1: Write the proportion equation
213,163,210.80 : 319,319,663.40 = 148,539,985.20 : x - Step 2: Convert to fraction form
213,163,210.80/319,319,663.40 = 148,539,985.20/x - Step 3: Cross multiply
213,163,210.80x = 319,319,663.40 × 148,539,985.20 - Step 4: Simplify right side
213,163,210.80x = 47,431,738,075,504,976 - Step 5: Solve for x
x = 47,431,738,075,504,976/213,163,210.80 - Step 6: Final answer
x = 222,513,715.65
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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.