Home / 390,831,113.64-586,265,525.19-128,509,856.98

Finding the Fourth Proportional to 390,831,113.64, 586,265,525.19 and 128,509,856.98

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Solution

The fourth proportional to 390,831,113.64, 586,265,525.19 and 128,509,856.98 is: 192,770,985.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,831,113.64 : 586,265,525.19 = 128,509,856.98 : x
  2. Step 2: Convert to fraction form
    390,831,113.64/586,265,525.19 = 128,509,856.98/x
  3. Step 3: Cross multiply
    390,831,113.64x = 586,265,525.19 × 128,509,856.98
  4. Step 4: Simplify right side
    390,831,113.64x = 75,340,898,793,005,840
  5. Step 5: Solve for x
    x = 75,340,898,793,005,840/390,831,113.64
  6. Step 6: Final answer
    x = 192,770,985.12

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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.