Finding the Fourth Proportional to 85,968,656.80, 128,952,985.20 and 74,771,216.80
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Solution
The fourth proportional to 85,968,656.80, 128,952,985.20 and 74,771,216.80 is: 112,156,825.20
Step by Step Solution
- Step 1: Write the proportion equation
85,968,656.80 : 128,952,985.20 = 74,771,216.80 : x - Step 2: Convert to fraction form
85,968,656.80/128,952,985.20 = 74,771,216.80/x - Step 3: Cross multiply
85,968,656.80x = 128,952,985.20 × 74,771,216.80 - Step 4: Simplify right side
85,968,656.80x = 9,641,971,613,396,392 - Step 5: Solve for x
x = 9,641,971,613,396,392/85,968,656.80 - Step 6: Final answer
x = 112,156,825.20
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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.