Home / 85,499,587.20-128,249,380.80-20,802,878.40

Finding the Fourth Proportional to 85,499,587.20, 128,249,380.80 and 20,802,878.40

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Solution

The fourth proportional to 85,499,587.20, 128,249,380.80 and 20,802,878.40 is: 31,204,317.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,499,587.20 : 128,249,380.80 = 20,802,878.40 : x
  2. Step 2: Convert to fraction form
    85,499,587.20/128,249,380.80 = 20,802,878.40/x
  3. Step 3: Cross multiply
    85,499,587.20x = 128,249,380.80 × 20,802,878.40
  4. Step 4: Simplify right side
    85,499,587.20x = 2,667,956,273,657,694.50
  5. Step 5: Solve for x
    x = 2,667,956,273,657,694.50/85,499,587.20
  6. Step 6: Final answer
    x = 31,204,317.60

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1.5x scale

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.