Home / 142,085.65-196,077.83-78,423.01

Finding the Fourth Proportional to 142,085.65, 196,077.83 and 78,423.01

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Solution

The fourth proportional to 142,085.65, 196,077.83 and 78,423.01 is: 108,223.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,085.65 : 196,077.83 = 78,423.01 : x
  2. Step 2: Convert to fraction form
    142,085.65/196,077.83 = 78,423.01/x
  3. Step 3: Cross multiply
    142,085.65x = 196,077.83 × 78,423.01
  4. Step 4: Simplify right side
    142,085.65x = 15,377,013,230.75
  5. Step 5: Solve for x
    x = 15,377,013,230.75/142,085.65
  6. Step 6: Final answer
    x = 108,223.55

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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.