Finding the Fourth Proportional to 106,985.16, 147,644.58 and 64,542.78
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Solution
The fourth proportional to 106,985.16, 147,644.58 and 64,542.78 is: 89,072.09
Step by Step Solution
- Step 1: Write the proportion equation
106,985.16 : 147,644.58 = 64,542.78 : x - Step 2: Convert to fraction form
106,985.16/147,644.58 = 64,542.78/x - Step 3: Cross multiply
106,985.16x = 147,644.58 × 64,542.78 - Step 4: Simplify right side
106,985.16x = 9,529,391,645.13 - Step 5: Solve for x
x = 9,529,391,645.13/106,985.16 - Step 6: Final answer
x = 89,072.09
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1.5x scale
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.