Home / 103,355.79-142,638.02-57,420.69

Finding the Fourth Proportional to 103,355.79, 142,638.02 and 57,420.69

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Solution

The fourth proportional to 103,355.79, 142,638.02 and 57,420.69 is: 79,244.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,355.79 : 142,638.02 = 57,420.69 : x
  2. Step 2: Convert to fraction form
    103,355.79/142,638.02 = 57,420.69/x
  3. Step 3: Cross multiply
    103,355.79x = 142,638.02 × 57,420.69
  4. Step 4: Simplify right side
    103,355.79x = 8,190,373,672.19
  5. Step 5: Solve for x
    x = 8,190,373,672.19/103,355.79
  6. Step 6: Final answer
    x = 79,244.46

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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.