Home / 72,968,701.20-100,697,985.72-39,931,820.88

Finding the Fourth Proportional to 72,968,701.20, 100,697,985.72 and 39,931,820.88

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Solution

The fourth proportional to 72,968,701.20, 100,697,985.72 and 39,931,820.88 is: 55,106,557.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,968,701.20 : 100,697,985.72 = 39,931,820.88 : x
  2. Step 2: Convert to fraction form
    72,968,701.20/100,697,985.72 = 39,931,820.88/x
  3. Step 3: Cross multiply
    72,968,701.20x = 100,697,985.72 × 39,931,820.88
  4. Step 4: Simplify right side
    72,968,701.20x = 4,021,053,928,747,838
  5. Step 5: Solve for x
    x = 4,021,053,928,747,838/72,968,701.20
  6. Step 6: Final answer
    x = 55,106,557.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.