Home / 130,692.96-180,457.88-100,430.55

Finding the Fourth Proportional to 130,692.96, 180,457.88 and 100,430.55

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Solution

The fourth proportional to 130,692.96, 180,457.88 and 100,430.55 is: 138,672.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,692.96 : 180,457.88 = 100,430.55 : x
  2. Step 2: Convert to fraction form
    130,692.96/180,457.88 = 100,430.55/x
  3. Step 3: Cross multiply
    130,692.96x = 180,457.88 × 100,430.55
  4. Step 4: Simplify right side
    130,692.96x = 18,123,483,638.08
  5. Step 5: Solve for x
    x = 18,123,483,638.08/130,692.96
  6. Step 6: Final answer
    x = 138,672.23

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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.