Finding the Fourth Proportional to 76,903,679.40, 115,355,519.10 and 71,064,421.80
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Solution
The fourth proportional to 76,903,679.40, 115,355,519.10 and 71,064,421.80 is: 106,596,632.70
Step by Step Solution
- Step 1: Write the proportion equation
76,903,679.40 : 115,355,519.10 = 71,064,421.80 : x - Step 2: Convert to fraction form
76,903,679.40/115,355,519.10 = 71,064,421.80/x - Step 3: Cross multiply
76,903,679.40x = 115,355,519.10 × 71,064,421.80 - Step 4: Simplify right side
76,903,679.40x = 8,197,673,266,280,356 - Step 5: Solve for x
x = 8,197,673,266,280,356/76,903,679.40 - Step 6: Final answer
x = 106,596,632.70
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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.