Home / 142,085.40-196,077.48-78,422.76

Finding the Fourth Proportional to 142,085.40, 196,077.48 and 78,422.76

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Solution

The fourth proportional to 142,085.40, 196,077.48 and 78,422.76 is: 108,223.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,085.40 : 196,077.48 = 78,422.76 : x
  2. Step 2: Convert to fraction form
    142,085.40/196,077.48 = 78,422.76/x
  3. Step 3: Cross multiply
    142,085.40x = 196,077.48 × 78,422.76
  4. Step 4: Simplify right side
    142,085.40x = 15,376,937,155.44
  5. Step 5: Solve for x
    x = 15,376,937,155.44/142,085.40
  6. Step 6: Final answer
    x = 108,223.20

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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.