Home / 142,399.04-196,505.76-77,869.84

Finding the Fourth Proportional to 142,399.04, 196,505.76 and 77,869.84

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Solution

The fourth proportional to 142,399.04, 196,505.76 and 77,869.84 is: 107,457.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,399.04 : 196,505.76 = 77,869.84 : x
  2. Step 2: Convert to fraction form
    142,399.04/196,505.76 = 77,869.84/x
  3. Step 3: Cross multiply
    142,399.04x = 196,505.76 × 77,869.84
  4. Step 4: Simplify right side
    142,399.04x = 15,301,872,090.28
  5. Step 5: Solve for x
    x = 15,301,872,090.28/142,399.04
  6. Step 6: Final answer
    x = 107,457.69

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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.