Finding the Fourth Proportional to 390,163,915.97, 585,247,829.95 and 99,031,125.39
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Solution
The fourth proportional to 390,163,915.97, 585,247,829.95 and 99,031,125.39 is: 148,547,184.55
Step by Step Solution
- Step 1: Write the proportion equation
390,163,915.97 : 585,247,829.95 = 99,031,125.39 : x - Step 2: Convert to fraction form
390,163,915.97/585,247,829.95 = 99,031,125.39/x - Step 3: Cross multiply
390,163,915.97x = 585,247,829.95 × 99,031,125.39 - Step 4: Simplify right side
390,163,915.97x = 57,957,751,229,932,952 - Step 5: Solve for x
x = 57,957,751,229,932,952/390,163,915.97 - Step 6: Final answer
x = 148,547,184.55
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.