Home / 128,368.95-177,135.52-70,999.16

Finding the Fourth Proportional to 128,368.95, 177,135.52 and 70,999.16

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Solution

The fourth proportional to 128,368.95, 177,135.52 and 70,999.16 is: 97,971.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,368.95 : 177,135.52 = 70,999.16 : x
  2. Step 2: Convert to fraction form
    128,368.95/177,135.52 = 70,999.16/x
  3. Step 3: Cross multiply
    128,368.95x = 177,135.52 × 70,999.16
  4. Step 4: Simplify right side
    128,368.95x = 12,576,472,062.99
  5. Step 5: Solve for x
    x = 12,576,472,062.99/128,368.95
  6. Step 6: Final answer
    x = 97,971.30

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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.