Home / 131,109,085.28-180,930,570-72,371,783.84

Finding the Fourth Proportional to 131,109,085.28, 180,930,570 and 72,371,783.84

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Solution

The fourth proportional to 131,109,085.28, 180,930,570 and 72,371,783.84 is: 99,873,079.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,109,085.28 : 180,930,570 = 72,371,783.84 : x
  2. Step 2: Convert to fraction form
    131,109,085.28/180,930,570 = 72,371,783.84/x
  3. Step 3: Cross multiply
    131,109,085.28x = 180,930,570 × 72,371,783.84
  4. Step 4: Simplify right side
    131,109,085.28x = 13,094,268,102,087,990
  5. Step 5: Solve for x
    x = 13,094,268,102,087,990/131,109,085.28
  6. Step 6: Final answer
    x = 99,873,079.54

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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.