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Finding the Fourth Proportional to 78,862.71, 118,174.37 and 57,816.76

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Solution

The fourth proportional to 78,862.71, 118,174.37 and 57,816.76 is: 86,637.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,862.71 : 118,174.37 = 57,816.76 : x
  2. Step 2: Convert to fraction form
    78,862.71/118,174.37 = 57,816.76/x
  3. Step 3: Cross multiply
    78,862.71x = 118,174.37 × 57,816.76
  4. Step 4: Simplify right side
    78,862.71x = 6,832,459,686.35
  5. Step 5: Solve for x
    x = 6,832,459,686.35/78,862.71
  6. Step 6: Final answer
    x = 86,637.40

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1.5x scale

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.