Home / 70,612.16-97,442.88-38,780.80

Finding the Fourth Proportional to 70,612.16, 97,442.88 and 38,780.80

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Solution

The fourth proportional to 70,612.16, 97,442.88 and 38,780.80 is: 53,516.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,612.16 : 97,442.88 = 38,780.80 : x
  2. Step 2: Convert to fraction form
    70,612.16/97,442.88 = 38,780.80/x
  3. Step 3: Cross multiply
    70,612.16x = 97,442.88 × 38,780.80
  4. Step 4: Simplify right side
    70,612.16x = 3,778,912,840.70
  5. Step 5: Solve for x
    x = 3,778,912,840.70/70,612.16
  6. Step 6: Final answer
    x = 53,516.46

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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.