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Finding the Fourth Proportional to 162,931,310.80, 244,680,401.40 and 86,403,806.80

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Solution

The fourth proportional to 162,931,310.80, 244,680,401.40 and 86,403,806.80 is: 129,756,018.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,931,310.80 : 244,680,401.40 = 86,403,806.80 : x
  2. Step 2: Convert to fraction form
    162,931,310.80/244,680,401.40 = 86,403,806.80/x
  3. Step 3: Cross multiply
    162,931,310.80x = 244,680,401.40 × 86,403,806.80
  4. Step 4: Simplify right side
    162,931,310.80x = 21,141,318,130,312,048
  5. Step 5: Solve for x
    x = 21,141,318,130,312,048/162,931,310.80
  6. Step 6: Final answer
    x = 129,756,018.20

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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.