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Finding the Fourth Proportional to 72,602,055.80, 108,903,083.70 and 56,162,814.20

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Solution

The fourth proportional to 72,602,055.80, 108,903,083.70 and 56,162,814.20 is: 84,244,221.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,602,055.80 : 108,903,083.70 = 56,162,814.20 : x
  2. Step 2: Convert to fraction form
    72,602,055.80/108,903,083.70 = 56,162,814.20/x
  3. Step 3: Cross multiply
    72,602,055.80x = 108,903,083.70 × 56,162,814.20
  4. Step 4: Simplify right side
    72,602,055.80x = 6,116,303,655,650,149
  5. Step 5: Solve for x
    x = 6,116,303,655,650,149/72,602,055.80
  6. Step 6: Final answer
    x = 84,244,221.30

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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.