Finding the Fourth Proportional to 81,422,641.80, 122,133,962.70 and 43,158,889.80
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Solution
The fourth proportional to 81,422,641.80, 122,133,962.70 and 43,158,889.80 is: 64,738,334.70
Step by Step Solution
- Step 1: Write the proportion equation
81,422,641.80 : 122,133,962.70 = 43,158,889.80 : x - Step 2: Convert to fraction form
81,422,641.80/122,133,962.70 = 43,158,889.80/x - Step 3: Cross multiply
81,422,641.80x = 122,133,962.70 × 43,158,889.80 - Step 4: Simplify right side
81,422,641.80x = 5,271,166,237,006,610 - Step 5: Solve for x
x = 5,271,166,237,006,610/81,422,641.80 - Step 6: Final answer
x = 64,738,334.70
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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.