Home / 129,031,145.60-193,546,718.40-77,970,819.20

Finding the Fourth Proportional to 129,031,145.60, 193,546,718.40 and 77,970,819.20

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Solution

The fourth proportional to 129,031,145.60, 193,546,718.40 and 77,970,819.20 is: 116,956,228.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,031,145.60 : 193,546,718.40 = 77,970,819.20 : x
  2. Step 2: Convert to fraction form
    129,031,145.60/193,546,718.40 = 77,970,819.20/x
  3. Step 3: Cross multiply
    129,031,145.60x = 193,546,718.40 × 77,970,819.20
  4. Step 4: Simplify right side
    129,031,145.60x = 15,090,996,187,119,714
  5. Step 5: Solve for x
    x = 15,090,996,187,119,714/129,031,145.60
  6. Step 6: Final answer
    x = 116,956,228.80

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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.