Home / 142,312.04-196,378.80-78,649.82

Finding the Fourth Proportional to 142,312.04, 196,378.80 and 78,649.82

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Solution

The fourth proportional to 142,312.04, 196,378.80 and 78,649.82 is: 108,530.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,312.04 : 196,378.80 = 78,649.82 : x
  2. Step 2: Convert to fraction form
    142,312.04/196,378.80 = 78,649.82/x
  3. Step 3: Cross multiply
    142,312.04x = 196,378.80 × 78,649.82
  4. Step 4: Simplify right side
    142,312.04x = 15,445,157,271.82
  5. Step 5: Solve for x
    x = 15,445,157,271.82/142,312.04
  6. Step 6: Final answer
    x = 108,530.22

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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.