Finding the Fourth Proportional to 91,878.84, 137,916.68 and 72,294.26
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Solution
The fourth proportional to 91,878.84, 137,916.68 and 72,294.26 is: 108,518.82
Step by Step Solution
- Step 1: Write the proportion equation
91,878.84 : 137,916.68 = 72,294.26 : x - Step 2: Convert to fraction form
91,878.84/137,916.68 = 72,294.26/x - Step 3: Cross multiply
91,878.84x = 137,916.68 × 72,294.26 - Step 4: Simplify right side
91,878.84x = 9,970,583,271.20 - Step 5: Solve for x
x = 9,970,583,271.20/91,878.84 - Step 6: Final answer
x = 108,518.82
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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.