Home / 80,457,686.90-120,686,530.35-19,873,412.90

Finding the Fourth Proportional to 80,457,686.90, 120,686,530.35 and 19,873,412.90

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Solution

The fourth proportional to 80,457,686.90, 120,686,530.35 and 19,873,412.90 is: 29,810,119.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,457,686.90 : 120,686,530.35 = 19,873,412.90 : x
  2. Step 2: Convert to fraction form
    80,457,686.90/120,686,530.35 = 19,873,412.90/x
  3. Step 3: Cross multiply
    80,457,686.90x = 120,686,530.35 × 19,873,412.90
  4. Step 4: Simplify right side
    80,457,686.90x = 2,398,453,249,113,931
  5. Step 5: Solve for x
    x = 2,398,453,249,113,931/80,457,686.90
  6. Step 6: Final answer
    x = 29,810,119.35

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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.