Home / 121,142,028.70-181,713,043.05-72,769,087.90

Finding the Fourth Proportional to 121,142,028.70, 181,713,043.05 and 72,769,087.90

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Solution

The fourth proportional to 121,142,028.70, 181,713,043.05 and 72,769,087.90 is: 109,153,631.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,142,028.70 : 181,713,043.05 = 72,769,087.90 : x
  2. Step 2: Convert to fraction form
    121,142,028.70/181,713,043.05 = 72,769,087.90/x
  3. Step 3: Cross multiply
    121,142,028.70x = 181,713,043.05 × 72,769,087.90
  4. Step 4: Simplify right side
    121,142,028.70x = 13,223,092,402,281,936
  5. Step 5: Solve for x
    x = 13,223,092,402,281,936/121,142,028.70
  6. Step 6: Final answer
    x = 109,153,631.85

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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.