Home / 128,312.64-177,075.36-71,726.40

Finding the Fourth Proportional to 128,312.64, 177,075.36 and 71,726.40

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Solution

The fourth proportional to 128,312.64, 177,075.36 and 71,726.40 is: 98,984.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,312.64 : 177,075.36 = 71,726.40 : x
  2. Step 2: Convert to fraction form
    128,312.64/177,075.36 = 71,726.40/x
  3. Step 3: Cross multiply
    128,312.64x = 177,075.36 × 71,726.40
  4. Step 4: Simplify right side
    128,312.64x = 12,700,978,101.50
  5. Step 5: Solve for x
    x = 12,700,978,101.50/128,312.64
  6. Step 6: Final answer
    x = 98,984.62

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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.