Home / 145,971.57-201,440.68-78,903.57

Finding the Fourth Proportional to 145,971.57, 201,440.68 and 78,903.57

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Solution

The fourth proportional to 145,971.57, 201,440.68 and 78,903.57 is: 108,886.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,971.57 : 201,440.68 = 78,903.57 : x
  2. Step 2: Convert to fraction form
    145,971.57/201,440.68 = 78,903.57/x
  3. Step 3: Cross multiply
    145,971.57x = 201,440.68 × 78,903.57
  4. Step 4: Simplify right side
    145,971.57x = 15,894,388,400.71
  5. Step 5: Solve for x
    x = 15,894,388,400.71/145,971.57
  6. Step 6: Final answer
    x = 108,886.88

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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.