Home / 93,438.12-128,920.50-55,685.64

Finding the Fourth Proportional to 93,438.12, 128,920.50 and 55,685.64

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Solution

The fourth proportional to 93,438.12, 128,920.50 and 55,685.64 is: 76,831.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,438.12 : 128,920.50 = 55,685.64 : x
  2. Step 2: Convert to fraction form
    93,438.12/128,920.50 = 55,685.64/x
  3. Step 3: Cross multiply
    93,438.12x = 128,920.50 × 55,685.64
  4. Step 4: Simplify right side
    93,438.12x = 7,179,020,551.62
  5. Step 5: Solve for x
    x = 7,179,020,551.62/93,438.12
  6. Step 6: Final answer
    x = 76,831.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.