Finding the Fourth Proportional to 130,679,421.60, 180,348,142.68 and 74,930,028.60
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Solution
The fourth proportional to 130,679,421.60, 180,348,142.68 and 74,930,028.60 is: 103,409,483.48
Step by Step Solution
- Step 1: Write the proportion equation
130,679,421.60 : 180,348,142.68 = 74,930,028.60 : x - Step 2: Convert to fraction form
130,679,421.60/180,348,142.68 = 74,930,028.60/x - Step 3: Cross multiply
130,679,421.60x = 180,348,142.68 × 74,930,028.60 - Step 4: Simplify right side
130,679,421.60x = 13,513,491,488,969,280 - Step 5: Solve for x
x = 13,513,491,488,969,280/130,679,421.60 - Step 6: Final answer
x = 103,409,483.48
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.