Finding the Fourth Proportional to 155,815,519.32, 215,031,746.70 and 86,199,700.68
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Solution
The fourth proportional to 155,815,519.32, 215,031,746.70 and 86,199,700.68 is: 118,959,088.82
Step by Step Solution
- Step 1: Write the proportion equation
155,815,519.32 : 215,031,746.70 = 86,199,700.68 : x - Step 2: Convert to fraction form
155,815,519.32/215,031,746.70 = 86,199,700.68/x - Step 3: Cross multiply
155,815,519.32x = 215,031,746.70 × 86,199,700.68 - Step 4: Simplify right side
155,815,519.32x = 18,535,672,202,237,580 - Step 5: Solve for x
x = 18,535,672,202,237,580/155,815,519.32 - Step 6: Final answer
x = 118,959,088.82
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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.