Finding the Fourth Proportional to 81,390.15, 121,866.48 and 51,646.95
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Solution
The fourth proportional to 81,390.15, 121,866.48 and 51,646.95 is: 77,331.62
Step by Step Solution
- Step 1: Write the proportion equation
81,390.15 : 121,866.48 = 51,646.95 : x - Step 2: Convert to fraction form
81,390.15/121,866.48 = 51,646.95/x - Step 3: Cross multiply
81,390.15x = 121,866.48 × 51,646.95 - Step 4: Simplify right side
81,390.15x = 6,294,031,999.24 - Step 5: Solve for x
x = 6,294,031,999.24/81,390.15 - Step 6: Final answer
x = 77,331.62
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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.