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Finding the Fourth Proportional to 72,606,660.80, 108,909,991.20 and 56,167,419.20

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Solution

The fourth proportional to 72,606,660.80, 108,909,991.20 and 56,167,419.20 is: 84,251,128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,606,660.80 : 108,909,991.20 = 56,167,419.20 : x
  2. Step 2: Convert to fraction form
    72,606,660.80/108,909,991.20 = 56,167,419.20/x
  3. Step 3: Cross multiply
    72,606,660.80x = 108,909,991.20 × 56,167,419.20
  4. Step 4: Simplify right side
    72,606,660.80x = 6,117,193,130,798,712
  5. Step 5: Solve for x
    x = 6,117,193,130,798,712/72,606,660.80
  6. Step 6: Final answer
    x = 84,251,128.80

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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.