Home / 128,038.05-176,692.50-70,677.36

Finding the Fourth Proportional to 128,038.05, 176,692.50 and 70,677.36

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Solution

The fourth proportional to 128,038.05, 176,692.50 and 70,677.36 is: 97,534.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,038.05 : 176,692.50 = 70,677.36 : x
  2. Step 2: Convert to fraction form
    128,038.05/176,692.50 = 70,677.36/x
  3. Step 3: Cross multiply
    128,038.05x = 176,692.50 × 70,677.36
  4. Step 4: Simplify right side
    128,038.05x = 12,488,159,431.80
  5. Step 5: Solve for x
    x = 12,488,159,431.80/128,038.05
  6. Step 6: Final answer
    x = 97,534.75

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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.