Finding the Fourth Proportional to 70,903.80, 106,355.70 and 57,781.80
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Solution
The fourth proportional to 70,903.80, 106,355.70 and 57,781.80 is: 86,672.70
Step by Step Solution
- Step 1: Write the proportion equation
70,903.80 : 106,355.70 = 57,781.80 : x - Step 2: Convert to fraction form
70,903.80/106,355.70 = 57,781.80/x - Step 3: Cross multiply
70,903.80x = 106,355.70 × 57,781.80 - Step 4: Simplify right side
70,903.80x = 6,145,423,786.26 - Step 5: Solve for x
x = 6,145,423,786.26/70,903.80 - Step 6: Final answer
x = 86,672.70
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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.