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Finding the Fourth Proportional to 142,987.95, 197,294.94 and 86,399.46

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Solution

The fourth proportional to 142,987.95, 197,294.94 and 86,399.46 is: 119,214.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,987.95 : 197,294.94 = 86,399.46 : x
  2. Step 2: Convert to fraction form
    142,987.95/197,294.94 = 86,399.46/x
  3. Step 3: Cross multiply
    142,987.95x = 197,294.94 × 86,399.46
  4. Step 4: Simplify right side
    142,987.95x = 17,046,176,276.73
  5. Step 5: Solve for x
    x = 17,046,176,276.73/142,987.95
  6. Step 6: Final answer
    x = 119,214.08

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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.