Finding the Fourth Proportional to 153,709.68, 212,119.74 and 85,731.06
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Solution
The fourth proportional to 153,709.68, 212,119.74 and 85,731.06 is: 118,309.07
Step by Step Solution
- Step 1: Write the proportion equation
153,709.68 : 212,119.74 = 85,731.06 : x - Step 2: Convert to fraction form
153,709.68/212,119.74 = 85,731.06/x - Step 3: Cross multiply
153,709.68x = 212,119.74 × 85,731.06 - Step 4: Simplify right side
153,709.68x = 18,185,248,667.87 - Step 5: Solve for x
x = 18,185,248,667.87/153,709.68 - Step 6: Final answer
x = 118,309.07
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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.