Home / 85,510,154.52-128,265,275.52-20,813,970.60

Finding the Fourth Proportional to 85,510,154.52, 128,265,275.52 and 20,813,970.60

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Solution

The fourth proportional to 85,510,154.52, 128,265,275.52 and 20,813,970.60 is: 31,220,966.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,510,154.52 : 128,265,275.52 = 20,813,970.60 : x
  2. Step 2: Convert to fraction form
    85,510,154.52/128,265,275.52 = 20,813,970.60/x
  3. Step 3: Cross multiply
    85,510,154.52x = 128,265,275.52 × 20,813,970.60
  4. Step 4: Simplify right side
    85,510,154.52x = 2,669,709,673,674,180
  5. Step 5: Solve for x
    x = 2,669,709,673,674,180/85,510,154.52
  6. Step 6: Final answer
    x = 31,220,966.55

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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.