Finding the Fourth Proportional to 128,259.84, 191,359.68 and 114,988.80
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Solution
The fourth proportional to 128,259.84, 191,359.68 and 114,988.80 is: 171,559.70
Step by Step Solution
- Step 1: Write the proportion equation
128,259.84 : 191,359.68 = 114,988.80 : x - Step 2: Convert to fraction form
128,259.84/191,359.68 = 114,988.80/x - Step 3: Cross multiply
128,259.84x = 191,359.68 × 114,988.80 - Step 4: Simplify right side
128,259.84x = 22,004,219,971.58 - Step 5: Solve for x
x = 22,004,219,971.58/128,259.84 - Step 6: Final answer
x = 171,559.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.