Home / 390,831,387.07-586,265,935.61-128,510,130.69

Finding the Fourth Proportional to 390,831,387.07, 586,265,935.61 and 128,510,130.69

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Solution

The fourth proportional to 390,831,387.07, 586,265,935.61 and 128,510,130.69 is: 192,771,395.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,831,387.07 : 586,265,935.61 = 128,510,130.69 : x
  2. Step 2: Convert to fraction form
    390,831,387.07/586,265,935.61 = 128,510,130.69/x
  3. Step 3: Cross multiply
    390,831,387.07x = 586,265,935.61 × 128,510,130.69
  4. Step 4: Simplify right side
    390,831,387.07x = 75,341,112,003,935,264
  5. Step 5: Solve for x
    x = 75,341,112,003,935,264/390,831,387.07
  6. Step 6: Final answer
    x = 192,771,395.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.