Finding the Fourth Proportional to 121,124,993.80, 181,687,490.70 and 70,106,657.80
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Solution
The fourth proportional to 121,124,993.80, 181,687,490.70 and 70,106,657.80 is: 105,159,986.70
Step by Step Solution
- Step 1: Write the proportion equation
121,124,993.80 : 181,687,490.70 = 70,106,657.80 : x - Step 2: Convert to fraction form
121,124,993.80/181,687,490.70 = 70,106,657.80/x - Step 3: Cross multiply
121,124,993.80x = 181,687,490.70 × 70,106,657.80 - Step 4: Simplify right side
121,124,993.80x = 12,737,502,737,045,582 - Step 5: Solve for x
x = 12,737,502,737,045,582/121,124,993.80 - Step 6: Final answer
x = 105,159,986.70
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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.