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Finding the Fourth Proportional to 136,909.60, 205,210.80 and 58,010.40

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Solution

The fourth proportional to 136,909.60, 205,210.80 and 58,010.40 is: 86,950.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,909.60 : 205,210.80 = 58,010.40 : x
  2. Step 2: Convert to fraction form
    136,909.60/205,210.80 = 58,010.40/x
  3. Step 3: Cross multiply
    136,909.60x = 205,210.80 × 58,010.40
  4. Step 4: Simplify right side
    136,909.60x = 11,904,360,592.32
  5. Step 5: Solve for x
    x = 11,904,360,592.32/136,909.60
  6. Step 6: Final answer
    x = 86,950.52

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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.