Home / 142,320.04-196,389.84-78,657.84

Finding the Fourth Proportional to 142,320.04, 196,389.84 and 78,657.84

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Solution

The fourth proportional to 142,320.04, 196,389.84 and 78,657.84 is: 108,541.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,320.04 : 196,389.84 = 78,657.84 : x
  2. Step 2: Convert to fraction form
    142,320.04/196,389.84 = 78,657.84/x
  3. Step 3: Cross multiply
    142,320.04x = 196,389.84 × 78,657.84
  4. Step 4: Simplify right side
    142,320.04x = 15,447,600,612.35
  5. Step 5: Solve for x
    x = 15,447,600,612.35/142,320.04
  6. Step 6: Final answer
    x = 108,541.29

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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.