Finding the Fourth Proportional to 77,477.70, 115,967.41 and 39,986.71
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Solution
The fourth proportional to 77,477.70, 115,967.41 and 39,986.71 is: 59,851.47
Step by Step Solution
- Step 1: Write the proportion equation
77,477.70 : 115,967.41 = 39,986.71 : x - Step 2: Convert to fraction form
77,477.70/115,967.41 = 39,986.71/x - Step 3: Cross multiply
77,477.70x = 115,967.41 × 39,986.71 - Step 4: Simplify right side
77,477.70x = 4,637,154,803.24 - Step 5: Solve for x
x = 4,637,154,803.24/77,477.70 - Step 6: Final answer
x = 59,851.47
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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.