Finding the Fourth Proportional to 86,681.80, 130,022.70 and 81,497.80
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Solution
The fourth proportional to 86,681.80, 130,022.70 and 81,497.80 is: 122,246.70
Step by Step Solution
- Step 1: Write the proportion equation
86,681.80 : 130,022.70 = 81,497.80 : x - Step 2: Convert to fraction form
86,681.80/130,022.70 = 81,497.80/x - Step 3: Cross multiply
86,681.80x = 130,022.70 × 81,497.80 - Step 4: Simplify right side
86,681.80x = 10,596,564,000.06 - Step 5: Solve for x
x = 10,596,564,000.06/86,681.80 - Step 6: Final answer
x = 122,246.70
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1.5x scale
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.