Finding the Fourth Proportional to 81,681.84, 112,706.51 and 49,860.99
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Solution
The fourth proportional to 81,681.84, 112,706.51 and 49,860.99 is: 68,799.36
Step by Step Solution
- Step 1: Write the proportion equation
81,681.84 : 112,706.51 = 49,860.99 : x - Step 2: Convert to fraction form
81,681.84/112,706.51 = 49,860.99/x - Step 3: Cross multiply
81,681.84x = 112,706.51 × 49,860.99 - Step 4: Simplify right side
81,681.84x = 5,619,657,918.74 - Step 5: Solve for x
x = 5,619,657,918.74/81,681.84 - Step 6: Final answer
x = 68,799.36
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.