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Finding the Fourth Proportional to 137,085.60, 205,628.40 and 70,432.80

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Solution

The fourth proportional to 137,085.60, 205,628.40 and 70,432.80 is: 105,649.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,085.60 : 205,628.40 = 70,432.80 : x
  2. Step 2: Convert to fraction form
    137,085.60/205,628.40 = 70,432.80/x
  3. Step 3: Cross multiply
    137,085.60x = 205,628.40 × 70,432.80
  4. Step 4: Simplify right side
    137,085.60x = 14,482,983,971.52
  5. Step 5: Solve for x
    x = 14,482,983,971.52/137,085.60
  6. Step 6: Final answer
    x = 105,649.20

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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.