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Finding the Fourth Proportional to 70,828,376.80, 106,242,565.20 and 64,781,759.20

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Solution

The fourth proportional to 70,828,376.80, 106,242,565.20 and 64,781,759.20 is: 97,172,638.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,828,376.80 : 106,242,565.20 = 64,781,759.20 : x
  2. Step 2: Convert to fraction form
    70,828,376.80/106,242,565.20 = 64,781,759.20/x
  3. Step 3: Cross multiply
    70,828,376.80x = 106,242,565.20 × 64,781,759.20
  4. Step 4: Simplify right side
    70,828,376.80x = 6,882,580,275,576,700
  5. Step 5: Solve for x
    x = 6,882,580,275,576,700/70,828,376.80
  6. Step 6: Final answer
    x = 97,172,638.80

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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.