Home / 145,983.69-201,456.95-78,915.69

Finding the Fourth Proportional to 145,983.69, 201,456.95 and 78,915.69

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Solution

The fourth proportional to 145,983.69, 201,456.95 and 78,915.69 is: 108,903.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,983.69 : 201,456.95 = 78,915.69 : x
  2. Step 2: Convert to fraction form
    145,983.69/201,456.95 = 78,915.69/x
  3. Step 3: Cross multiply
    145,983.69x = 201,456.95 × 78,915.69
  4. Step 4: Simplify right side
    145,983.69x = 15,898,113,819.97
  5. Step 5: Solve for x
    x = 15,898,113,819.97/145,983.69
  6. Step 6: Final answer
    x = 108,903.36

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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.