Finding the Fourth Proportional to 128,862.08, 193,348.80 and 69,739.76
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Solution
The fourth proportional to 128,862.08, 193,348.80 and 69,739.76 is: 104,639.77
Step by Step Solution
- Step 1: Write the proportion equation
128,862.08 : 193,348.80 = 69,739.76 : x - Step 2: Convert to fraction form
128,862.08/193,348.80 = 69,739.76/x - Step 3: Cross multiply
128,862.08x = 193,348.80 × 69,739.76 - Step 4: Simplify right side
128,862.08x = 13,484,098,908.29 - Step 5: Solve for x
x = 13,484,098,908.29/128,862.08 - Step 6: Final answer
x = 104,639.77
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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.