Finding the Fourth Proportional to 99,019.68, 136,644.68 and 56,574.60
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Solution
The fourth proportional to 99,019.68, 136,644.68 and 56,574.60 is: 78,071.53
Step by Step Solution
- Step 1: Write the proportion equation
99,019.68 : 136,644.68 = 56,574.60 : x - Step 2: Convert to fraction form
99,019.68/136,644.68 = 56,574.60/x - Step 3: Cross multiply
99,019.68x = 136,644.68 × 56,574.60 - Step 4: Simplify right side
99,019.68x = 7,730,618,113.13 - Step 5: Solve for x
x = 7,730,618,113.13/99,019.68 - Step 6: Final answer
x = 78,071.53
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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.