Home / 142,148.34-196,158.78-77,612.40

Finding the Fourth Proportional to 142,148.34, 196,158.78 and 77,612.40

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Solution

The fourth proportional to 142,148.34, 196,158.78 and 77,612.40 is: 107,101.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,148.34 : 196,158.78 = 77,612.40 : x
  2. Step 2: Convert to fraction form
    142,148.34/196,158.78 = 77,612.40/x
  3. Step 3: Cross multiply
    142,148.34x = 196,158.78 × 77,612.40
  4. Step 4: Simplify right side
    142,148.34x = 15,224,353,696.87
  5. Step 5: Solve for x
    x = 15,224,353,696.87/142,148.34
  6. Step 6: Final answer
    x = 107,101.87

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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.