Finding the Fourth Proportional to 103,897.71, 143,312.36 and 72,054.99
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Solution
The fourth proportional to 103,897.71, 143,312.36 and 72,054.99 is: 99,389.78
Step by Step Solution
- Step 1: Write the proportion equation
103,897.71 : 143,312.36 = 72,054.99 : x - Step 2: Convert to fraction form
103,897.71/143,312.36 = 72,054.99/x - Step 3: Cross multiply
103,897.71x = 143,312.36 × 72,054.99 - Step 4: Simplify right side
103,897.71x = 10,326,370,306.40 - Step 5: Solve for x
x = 10,326,370,306.40/103,897.71 - Step 6: Final answer
x = 99,389.78
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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.