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Finding the Fourth Proportional to 107,242.81, 148,008.20 and 61,920.71

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Solution

The fourth proportional to 107,242.81, 148,008.20 and 61,920.71 is: 85,458.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,242.81 : 148,008.20 = 61,920.71 : x
  2. Step 2: Convert to fraction form
    107,242.81/148,008.20 = 61,920.71/x
  3. Step 3: Cross multiply
    107,242.81x = 148,008.20 × 61,920.71
  4. Step 4: Simplify right side
    107,242.81x = 9,164,772,829.82
  5. Step 5: Solve for x
    x = 9,164,772,829.82/107,242.81
  6. Step 6: Final answer
    x = 85,458.16

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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.