Home / 72,438,009.20-108,657,013.80-18,585,321.20

Finding the Fourth Proportional to 72,438,009.20, 108,657,013.80 and 18,585,321.20

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Solution

The fourth proportional to 72,438,009.20, 108,657,013.80 and 18,585,321.20 is: 27,877,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,438,009.20 : 108,657,013.80 = 18,585,321.20 : x
  2. Step 2: Convert to fraction form
    72,438,009.20/108,657,013.80 = 18,585,321.20/x
  3. Step 3: Cross multiply
    72,438,009.20x = 108,657,013.80 × 18,585,321.20
  4. Step 4: Simplify right side
    72,438,009.20x = 2,019,425,502,105,832.50
  5. Step 5: Solve for x
    x = 2,019,425,502,105,832.50/72,438,009.20
  6. Step 6: Final answer
    x = 27,877,981.80

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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.