Home / 142,301.08-196,369.10-78,637.50

Finding the Fourth Proportional to 142,301.08, 196,369.10 and 78,637.50

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Solution

The fourth proportional to 142,301.08, 196,369.10 and 78,637.50 is: 108,516.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,301.08 : 196,369.10 = 78,637.50 : x
  2. Step 2: Convert to fraction form
    142,301.08/196,369.10 = 78,637.50/x
  3. Step 3: Cross multiply
    142,301.08x = 196,369.10 × 78,637.50
  4. Step 4: Simplify right side
    142,301.08x = 15,441,975,101.25
  5. Step 5: Solve for x
    x = 15,441,975,101.25/142,301.08
  6. Step 6: Final answer
    x = 108,516.22

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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.