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Finding the Fourth Proportional to 77,613,784.80, 116,421,022.80 and 20,101,970.40

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Solution

The fourth proportional to 77,613,784.80, 116,421,022.80 and 20,101,970.40 is: 30,153,045.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,613,784.80 : 116,421,022.80 = 20,101,970.40 : x
  2. Step 2: Convert to fraction form
    77,613,784.80/116,421,022.80 = 20,101,970.40/x
  3. Step 3: Cross multiply
    77,613,784.80x = 116,421,022.80 × 20,101,970.40
  4. Step 4: Simplify right side
    77,613,784.80x = 2,340,291,954,263,325
  5. Step 5: Solve for x
    x = 2,340,291,954,263,325/77,613,784.80
  6. Step 6: Final answer
    x = 30,153,045.11

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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.