Finding the Fourth Proportional to 78,780.39, 108,718.97 and 42,970.99
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Solution
The fourth proportional to 78,780.39, 108,718.97 and 42,970.99 is: 59,301.07
Step by Step Solution
- Step 1: Write the proportion equation
78,780.39 : 108,718.97 = 42,970.99 : x - Step 2: Convert to fraction form
78,780.39/108,718.97 = 42,970.99/x - Step 3: Cross multiply
78,780.39x = 108,718.97 × 42,970.99 - Step 4: Simplify right side
78,780.39x = 4,671,761,772.68 - Step 5: Solve for x
x = 4,671,761,772.68/78,780.39 - Step 6: Final answer
x = 59,301.07
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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.