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Finding the Fourth Proportional to 207,415.80, 310,605.30 and 136,913.40

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Solution

The fourth proportional to 207,415.80, 310,605.30 and 136,913.40 is: 205,027.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,415.80 : 310,605.30 = 136,913.40 : x
  2. Step 2: Convert to fraction form
    207,415.80/310,605.30 = 136,913.40/x
  3. Step 3: Cross multiply
    207,415.80x = 310,605.30 × 136,913.40
  4. Step 4: Simplify right side
    207,415.80x = 42,526,027,681.02
  5. Step 5: Solve for x
    x = 42,526,027,681.02/207,415.80
  6. Step 6: Final answer
    x = 205,027.91

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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.