Finding the Fourth Proportional to 77,985.06, 107,630.01 and 47,772.06
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Solution
The fourth proportional to 77,985.06, 107,630.01 and 47,772.06 is: 65,931.95
Step by Step Solution
- Step 1: Write the proportion equation
77,985.06 : 107,630.01 = 47,772.06 : x - Step 2: Convert to fraction form
77,985.06/107,630.01 = 47,772.06/x - Step 3: Cross multiply
77,985.06x = 107,630.01 × 47,772.06 - Step 4: Simplify right side
77,985.06x = 5,141,707,295.52 - Step 5: Solve for x
x = 5,141,707,295.52/77,985.06 - Step 6: Final answer
x = 65,931.95
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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.