Home / 142,937.31-197,248.90-78,405.63

Finding the Fourth Proportional to 142,937.31, 197,248.90 and 78,405.63

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Solution

The fourth proportional to 142,937.31, 197,248.90 and 78,405.63 is: 108,197.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,937.31 : 197,248.90 = 78,405.63 : x
  2. Step 2: Convert to fraction form
    142,937.31/197,248.90 = 78,405.63/x
  3. Step 3: Cross multiply
    142,937.31x = 197,248.90 × 78,405.63
  4. Step 4: Simplify right side
    142,937.31x = 15,465,424,271.31
  5. Step 5: Solve for x
    x = 15,465,424,271.31/142,937.31
  6. Step 6: Final answer
    x = 108,197.25

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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.