Home / 457,630.15-686,437.87-142,087.36

Finding the Fourth Proportional to 457,630.15, 686,437.87 and 142,087.36

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Solution

The fourth proportional to 457,630.15, 686,437.87 and 142,087.36 is: 213,128.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,630.15 : 686,437.87 = 142,087.36 : x
  2. Step 2: Convert to fraction form
    457,630.15/686,437.87 = 142,087.36/x
  3. Step 3: Cross multiply
    457,630.15x = 686,437.87 × 142,087.36
  4. Step 4: Simplify right side
    457,630.15x = 97,534,144,041.89
  5. Step 5: Solve for x
    x = 97,534,144,041.89/457,630.15
  6. Step 6: Final answer
    x = 213,128.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.