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Finding the Fourth Proportional to 120,148.68, 165,798.49 and 66,430.47

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Solution

The fourth proportional to 120,148.68, 165,798.49 and 66,430.47 is: 91,670.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,148.68 : 165,798.49 = 66,430.47 : x
  2. Step 2: Convert to fraction form
    120,148.68/165,798.49 = 66,430.47/x
  3. Step 3: Cross multiply
    120,148.68x = 165,798.49 × 66,430.47
  4. Step 4: Simplify right side
    120,148.68x = 11,014,071,615.99
  5. Step 5: Solve for x
    x = 11,014,071,615.99/120,148.68
  6. Step 6: Final answer
    x = 91,670.35

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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.