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Finding the Fourth Proportional to 124,877.60, 187,316.40 and 77,638.40

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Solution

The fourth proportional to 124,877.60, 187,316.40 and 77,638.40 is: 116,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,877.60 : 187,316.40 = 77,638.40 : x
  2. Step 2: Convert to fraction form
    124,877.60/187,316.40 = 77,638.40/x
  3. Step 3: Cross multiply
    124,877.60x = 187,316.40 × 77,638.40
  4. Step 4: Simplify right side
    124,877.60x = 14,542,945,589.76
  5. Step 5: Solve for x
    x = 14,542,945,589.76/124,877.60
  6. Step 6: Final answer
    x = 116,457.60

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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.