Home / 142,387.49-196,495.07-77,860.91

Finding the Fourth Proportional to 142,387.49, 196,495.07 and 77,860.91

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Solution

The fourth proportional to 142,387.49, 196,495.07 and 77,860.91 is: 107,448.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,387.49 : 196,495.07 = 77,860.91 : x
  2. Step 2: Convert to fraction form
    142,387.49/196,495.07 = 77,860.91/x
  3. Step 3: Cross multiply
    142,387.49x = 196,495.07 × 77,860.91
  4. Step 4: Simplify right side
    142,387.49x = 15,299,283,588.93
  5. Step 5: Solve for x
    x = 15,299,283,588.93/142,387.49
  6. Step 6: Final answer
    x = 107,448.23

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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.