Home / 128,748,366.81-178,140,601.40-112,262,844.60

Finding the Fourth Proportional to 128,748,366.81, 178,140,601.40 and 112,262,844.60

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Solution

The fourth proportional to 128,748,366.81, 178,140,601.40 and 112,262,844.60 is: 155,330,674.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,748,366.81 : 178,140,601.40 = 112,262,844.60 : x
  2. Step 2: Convert to fraction form
    128,748,366.81/178,140,601.40 = 112,262,844.60/x
  3. Step 3: Cross multiply
    128,748,366.81x = 178,140,601.40 × 112,262,844.60
  4. Step 4: Simplify right side
    128,748,366.81x = 19,998,570,651,357,428
  5. Step 5: Solve for x
    x = 19,998,570,651,357,428/128,748,366.81
  6. Step 6: Final answer
    x = 155,330,674.45

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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.