Home / 121,142,117.70-181,713,176.55-72,769,176.90

Finding the Fourth Proportional to 121,142,117.70, 181,713,176.55 and 72,769,176.90

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Solution

The fourth proportional to 121,142,117.70, 181,713,176.55 and 72,769,176.90 is: 109,153,765.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,142,117.70 : 181,713,176.55 = 72,769,176.90 : x
  2. Step 2: Convert to fraction form
    121,142,117.70/181,713,176.55 = 72,769,176.90/x
  3. Step 3: Cross multiply
    121,142,117.70x = 181,713,176.55 × 72,769,176.90
  4. Step 4: Simplify right side
    121,142,117.70x = 13,223,118,289,427,884
  5. Step 5: Solve for x
    x = 13,223,118,289,427,884/121,142,117.70
  6. Step 6: Final answer
    x = 109,153,765.35

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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.