Home / 142,066.20-212,840.10-86,597.40

Finding the Fourth Proportional to 142,066.20, 212,840.10 and 86,597.40

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Solution

The fourth proportional to 142,066.20, 212,840.10 and 86,597.40 is: 129,738.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,066.20 : 212,840.10 = 86,597.40 : x
  2. Step 2: Convert to fraction form
    142,066.20/212,840.10 = 86,597.40/x
  3. Step 3: Cross multiply
    142,066.20x = 212,840.10 × 86,597.40
  4. Step 4: Simplify right side
    142,066.20x = 18,431,399,275.74
  5. Step 5: Solve for x
    x = 18,431,399,275.74/142,066.20
  6. Step 6: Final answer
    x = 129,738.10

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1.5x scale

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.