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Finding the Fourth Proportional to 70,335.71, 105,430.64 and 43,979.93

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Solution

The fourth proportional to 70,335.71, 105,430.64 and 43,979.93 is: 65,924.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,335.71 : 105,430.64 = 43,979.93 : x
  2. Step 2: Convert to fraction form
    70,335.71/105,430.64 = 43,979.93/x
  3. Step 3: Cross multiply
    70,335.71x = 105,430.64 × 43,979.93
  4. Step 4: Simplify right side
    70,335.71x = 4,636,831,420.00
  5. Step 5: Solve for x
    x = 4,636,831,420.00/70,335.71
  6. Step 6: Final answer
    x = 65,924.29

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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.