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Finding the Fourth Proportional to 141,681.76, 195,521.12 and 78,019.68

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Solution

The fourth proportional to 141,681.76, 195,521.12 and 78,019.68 is: 107,667.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,681.76 : 195,521.12 = 78,019.68 : x
  2. Step 2: Convert to fraction form
    141,681.76/195,521.12 = 78,019.68/x
  3. Step 3: Cross multiply
    141,681.76x = 195,521.12 × 78,019.68
  4. Step 4: Simplify right side
    141,681.76x = 15,254,495,215.64
  5. Step 5: Solve for x
    x = 15,254,495,215.64/141,681.76
  6. Step 6: Final answer
    x = 107,667.32

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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.