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Finding the Fourth Proportional to 70,999.20, 106,498.80 and 70,538.40

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Solution

The fourth proportional to 70,999.20, 106,498.80 and 70,538.40 is: 105,807.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,999.20 : 106,498.80 = 70,538.40 : x
  2. Step 2: Convert to fraction form
    70,999.20/106,498.80 = 70,538.40/x
  3. Step 3: Cross multiply
    70,999.20x = 106,498.80 × 70,538.40
  4. Step 4: Simplify right side
    70,999.20x = 7,512,254,953.92
  5. Step 5: Solve for x
    x = 7,512,254,953.92/70,999.20
  6. Step 6: Final answer
    x = 105,807.60

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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.