Finding the Fourth Proportional to 106,931.91, 160,605.46 and 78,740.63
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Solution
The fourth proportional to 106,931.91, 160,605.46 and 78,740.63 is: 118,263.80
Step by Step Solution
- Step 1: Write the proportion equation
106,931.91 : 160,605.46 = 78,740.63 : x - Step 2: Convert to fraction form
106,931.91/160,605.46 = 78,740.63/x - Step 3: Cross multiply
106,931.91x = 160,605.46 × 78,740.63 - Step 4: Simplify right side
106,931.91x = 12,646,174,101.96 - Step 5: Solve for x
x = 12,646,174,101.96/106,931.91 - Step 6: Final answer
x = 118,263.80
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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.