Home / 402,407,999.60-603,556,012.20-129,806,322.80

Finding the Fourth Proportional to 402,407,999.60, 603,556,012.20 and 129,806,322.80

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Solution

The fourth proportional to 402,407,999.60, 603,556,012.20 and 129,806,322.80 is: 194,691,424.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,407,999.60 : 603,556,012.20 = 129,806,322.80 : x
  2. Step 2: Convert to fraction form
    402,407,999.60/603,556,012.20 = 129,806,322.80/x
  3. Step 3: Cross multiply
    402,407,999.60x = 603,556,012.20 × 129,806,322.80
  4. Step 4: Simplify right side
    402,407,999.60x = 78,345,386,547,513,936
  5. Step 5: Solve for x
    x = 78,345,386,547,513,936/402,407,999.60
  6. Step 6: Final answer
    x = 194,691,424.19

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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.