Finding the Fourth Proportional to 139,798.98, 209,491.09 and 102,681.54
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Solution
The fourth proportional to 139,798.98, 209,491.09 and 102,681.54 is: 153,869.99
Step by Step Solution
- Step 1: Write the proportion equation
139,798.98 : 209,491.09 = 102,681.54 : x - Step 2: Convert to fraction form
139,798.98/209,491.09 = 102,681.54/x - Step 3: Cross multiply
139,798.98x = 209,491.09 × 102,681.54 - Step 4: Simplify right side
139,798.98x = 21,510,867,737.48 - Step 5: Solve for x
x = 21,510,867,737.48/139,798.98 - Step 6: Final answer
x = 153,869.99
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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.